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Why Unlocked Phones Don't Work In the US

schnell writes "Unlocked cellular devices have long been a part of the wireless landscape in Europe and elsewhere. But longtime industry analyst Andrew Seybold explains why that model doesn't work in the US due to technology and frequency differences, and why LTE adoption may not make things any better."

42 of 442 comments (clear)

  1. Yeah right. by Anonymous Coward · · Score: 5, Insightful

    Technology and frequency differences? You've got to be shitting me. They don't work because the cell operators are greedy assholes.

    1. Re:Yeah right. by ScrewMaster · · Score: 5, Insightful

      Technology and frequency differences? You've got to be shitting me. They don't work because the cell operators are greedy assholes.

      It would be interesting if the cell phone manufacturers offered a swappable, standardized radio module that would pop in and out like the battery. That way you could buy an expensive smartphone, and leverage that investment by just picking up a new radio module to move to a new network. Of course, the reality is that these pricks can't even agree on a particular power plug, so I wouldn't hold your breath and besides, they're perfectly happy if you are forced to buy a brand-new phone just to go to a different wireless provider.

      --
      The higher the technology, the sharper that two-edged sword.
    2. Re:Yeah right. by h4rr4r · · Score: 4, Interesting

      Other than Apple who is not using the micro USB interface these days?

    3. Re:Yeah right. by h4rr4r · · Score: 4, Informative

      Galaxy line uses micro USB.

    4. Re:Yeah right. by MoonBuggy · · Score: 5, Informative

      I know it's against Slashdot tradition, but I'd recommend that you RTFA. The summary gave me the same impression - that it would be some corporate fluff piece about how it's a good thing that the networks are screwing you - but the article itself is actually a very well reasoned technical explanation of the various bits of spectrum (and the the protocols running on them) in use today and in the near future, and how these often interfere with interoperability.

    5. Re:Yeah right. by Cimexus · · Score: 4, Insightful

      Agreed. Using the technology as an excuse completely sidesteps the real issue here.

      Especially the 'differing frequencies' argument - haha wtf? Every GSM phone under the sun these days is at least tri-band and generally quad-band, which means it will work on almost any GSM network in the world. Differing frequencies is NOT a barrier to unlocked phones. Hell, I'm a dual Australian and US citizen and spend a lot of time in both countries, and I use my iPhone 4 (GSM quadband) in both countries without problems. It's an Australian-market iPhone 4 which means it's unlocked from the factory (or more accurately, was never locked in the first place). I have a Vodafone AU SIM in it and it roams quite happily in the US on either AT&T or T-Mobile (although T-Mobile is EDGE only for data due to them using a weird uplink frequency for UMTS/HSDPA ... EDGE is still fast enough for most things though)

      The only 'unique' thing about the US market, technology wise, is that the big carriers are split between GSM (AT&T, T-Mobile) and CDMA (Sprint, Verizon). So if you had an unlocked phone of either variety in the US, your choices would be restricted more than they would be in other markets. But there would still be ~some~ choice. And the technology itself doesn't preclude unlocked phones (which you CAN get in the US, e.g. via Newegg ... it's just that the carriers themselves don't usually offer unlocked phones in their stores, and won't offer you a plan that doesn't include the handset repayments component - T-Mobile excepted).

      So basically, yeah, the US market has come to accept 'cheap upfront phone then pay it off over a 24 month contract' business model as the norm, whereas in other countries, it's usually only an 'option' rather than the norm. But the carriers could offer SIM-only/Bring Your Own Phone plans any time they wanted. It's not a technology issue - it's an issue of the phone companies liking the current model (since it gives them more predictable income when they can tie customers in for two years at a time), and the average consumer not really knowing that there are alternatives.

    6. Re:Yeah right. by dgatwood · · Score: 4, Interesting

      Except that these barriers are all really nothing more than a chicken-and-egg problem. Nobody builds a phone that can do all the HSDPA bands, but that's not because it's hard. The only customers who care about the 1700 MHz band are in the U.S. and Canada on carriers that don't sell unlocked phones, and there are no laws requiring unlocking. As a result, those customers don't expect to be able to move from one carrier to another without unlocking. As a result, the handset manufacturers don't need to build phones that allow this. As a result, the chipset vendors largely haven't bothered to design the chips to make this possible.

      If you can build a 5-band handset, a 6-band handset is really only incrementally harder. Even a 12-band handset is only incrementally harder when you factor in electronically tunable antennas into the mix.

      --

      Check out my sci-fi/humor trilogy at PatriotsBooks.

    7. Re:Yeah right. by MtHuurne · · Score: 4, Informative

      There is a reason for that: after the EU said "either you lot pick a single charger plug or we'll do it for you", the phone manufacturers decided to standardize on micro USB. You'll find that most of the other differences between the US and EU cell phone markets are also due to pressure from the EU: cell operators are not nicer on this side of the pond, they are just kept on a tighter leash.

    8. Re:Yeah right. by nine-times · · Score: 4, Insightful

      I think you're misunderstanding the idea here. The point is, even if you are willing to shell out the extra money to get an unsubsidized unlocked phone, you're generally still stuck on a given carrier anyway. I can't just take my AT&T phone and hook up to Verizon's or Sprint's network because their networks are different technologies.

      Even switching to T-Mobile, which should be possible because both AT&T and T-Mobile are GSM, doesn't really work because AT&T and T-Mobile use different frequencies for 3G. For example, if you bought a Nexus One, you would have had to have chosen whether you wanted the T-Mobile version or AT&T version, and there was never the option of using the Nexus One on Verizon. It wasn't because the Nexus One was locked.

      That doesn't mean the carriers aren't greedy assholes. It means that getting the phones to be unlocked doesn't really solve the problem.

    9. Re:Yeah right. by gandhi_2 · · Score: 4, Insightful

      Imagine... a radio system that is capable of receiving and transmitting on one of several frequencies. And switching between frequencies on command.

      What a wonder future that would be!

    10. Re:Yeah right. by tlhIngan · · Score: 5, Informative

      Unfortunately, a standardized plug does diddly if you don't standardize how to charge.

      There are a few billion ways you can charge from USB. There's the good old dumb "assume 500mA" method - where you assume you can draw 500mA from USB. Works fine for PCs and their chargers, but not so much if your USB host is power-limited.

      Then there's the USB charging spec - where the charger shorts D+ and D- lines, and the device assumes it can draw the appropriate amount of current as the charger it comes with - 500mA, 800mA, 1A, 2A. Again, no standard on how to pick the current, so a device is free to draw as much as possible.

      There's the Apple method, where resistors on D+ and D- lines tell the device how much power the charger can provide to prevent drawing too much power (iPods start at 100mA until enumerated at 500mA or more, or connected to a charger where it can select 500mA, 1A or 2A).

      There's also using the ID line with resistors that identify the device - an ADC converts the voltage to identify the accessory (charger, car kit, high-current charger, etc).

      There's also the USB high power spec, but that's for USB hosts that can provide more power.

      Even worse, I've seen some devices destroy the charger because they assume the manufacturer's charger and draw more current than the charger can provide.

      Fun fun fun.

      Anyhow, at least for iPhone users, you can buy iPhones in Canada which are fully unlocked from Apple stores in Canada. I've seen a number of US people come to Canada to buy unlocked iPhones.

    11. Re:Yeah right. by RMH101 · · Score: 3, Informative

      absolute crap. The radio is certified, then can be inserted into any standard device. The 3G bios lock is to protect revenues, not to protect the RF spectrum. If you can buy a 3G modem in your country it will have been certified there, and so will work fine when used in the conditions it was certified for, i.e. stuck inside a laptop.

    12. Re:Yeah right. by TheThiefMaster · · Score: 4, Informative

      Actually MiniUSB is more fragile:

      http://en.wikipedia.org/wiki/MiniUSB#Durability

      The newer Micro-USB receptacles are designed to allow up to 10,000 cycles of insertion and removal between the receptacle and plug, compared to 1500 for the standard USB and 5000 for the Mini-USB receptacle. This is accomplished by adding a locking device and by moving the leaf-spring connector from the jack to the plug, so that the most-stressed part is on the cable side of the connection. This change was made so that the connector on the less expensive cable would bear the most wear instead of the more expensive micro-USB device.

    13. Re:Yeah right. by TheRaven64 · · Score: 3, Interesting

      Yup, it's a shame that they didn't just invalidate Apple's patents on the dock connector. It contains pins for USB, FireWire, RS-232, analogue audio and composite video as well as power. I'd love to see something like that as standard. If only it had something like DisplayPort or HDMI as well, it would be the only plug you'd need for a handheld computer.

      --
      I am TheRaven on Soylent News
    14. Re:Yeah right. by TheRaven64 · · Score: 3, Funny

      Completely true. This is why it is not possible to buy UMTS or WiFi module that plug into USB, PCI, miniPCI, or ExpressCard slots.

      --
      I am TheRaven on Soylent News
    15. Re:Yeah right. by buchanmilne · · Score: 4, Interesting

      It would be interesting if the cell phone manufacturers offered a swappable, standardized radio module that would pop in and out like the battery.

      It would be much more interesting, and much less expensive, pose no unresolved technical challenges, if the shared-majority wireless operators in the US (Sprint, Verizon), would just use an existing swappable, standardised user identity module, like R-UIM cards. However, they are too concerned with fighting each other to realise that their technology has already lost, due to not being viable in other countries (where R-UIM is a requirement, but all decent phones are made for Sprint and Verizon, almost exclusively without R-UIM support). Not separating the number from the phone makes it too much of a hassle for users to switch phones, sell used phones, travel without roaming etc. (and of course, switching networks, which is what they are actually after, but damaging the whole CDMA market in the process), which are all trivially possible with GSM.

      Maybe they could allow roaming to more than just a handful of international CDMA operators. For example, there are multiple CDMA operators in many African countries, (including some that have tens of thousands of US citizens working in them), but not one is supported for roaming by Verizon or Sprint. Verizon seems to have more limited roaming than the cheapest crappiest GSM operators, and Sprint mostly provides roaming via GSM operators (so, if you travel, you already need a dual-tech phone, or two phones, why not just use GSM all the time?).

      Huawei (who makes a lot of CDMA-based gear, both telco-side and handsets, mostly for China Telecom I guess) has a nice article covering the issues with CDMA roaming. Most of them are due to "American mindset" that is inherent in CDMA and CDMA deployments. Of course, Huawei is punting their solutions to these problems, but waiting for all CDMA operators to refresh their kit will make you old.

      Also, maybe if CDMA operators had consistent international dialing/number representation formats (like the +XX convention used by all GSM operators), users would figure out how to actually make international calls via CDMA. But, who needs numbers that don't start with a "1" anyway ...

      That way you could buy an expensive smartphone, and leverage that investment by just picking up a new radio module to move to a new network.

      At the moment, 52% of US subscribers can't even move between operators that use the *same* baseband modules (vs less than 15% worldwide). Maybe you should try and solve that problem first.

  2. Takes some patience and creativity by Mean+Variance · · Score: 3, Interesting

    I only use unlocked phones and prepaid plans, T-Mobile, PagePlus mostly. It can be done. There are plenty of unlocked phones available on NewEgg, Dell, Amazon, and Craigslist.

    1. Re:Takes some patience and creativity by Potor · · Score: 3, Informative

      Indeed. I use an unlocked tri-band GSM phone about half the year in Europe, and the same phone about half the year in the States. Also T-Mobile in the States, and strictly prepaid on either continent.

      Could not be simpler. I tape the SIM card not being used on the back of my passport.

    2. Re:Takes some patience and creativity by h4rr4r · · Score: 3, Interesting

      It seems PagePlus only offers 50MB of data, so forget about using your phone as GPS device or doing anything data related while not at home/work.

    3. Re:Takes some patience and creativity by Cimexus · · Score: 4, Informative

      Yeah Japan is even worse than the US in that regard - although SoftBank runs a GSM network so theoretically an unlocked quadband GSM phone (like the iPhone 4) should work in both the US and Japan with just a SIM card change.

      I say 'theoretically' though because although there's no ~technical~ reason why this can't work, it won't work in practise since they won't let the phone actually connect to the network unless its a recognised IMEI from a contracted phone that they already sold you ;)

    4. Re:Takes some patience and creativity by Microlith · · Score: 4, Informative

      Japan is the holdout; you have to have a local phone. AFAIK, there is no common phone that will in both US and Japan just by swapping a SIM card.

      Not on 3G, but if your phone supports the European 3G bands it'll work fine in Japan. My N900 served me quite well while I was over there in August on NTT DoCoMo's FOMA 3.5G network, even all the way out in Tochigi prefecture.

      Of course, I only get 2.5G in the US on AT&T, but them's the breaks when you buy what you want rather than what you're offered.

  3. Re:Every Network Is Different by LurkerXXX · · Score: 5, Insightful

    Yeah, breaking up Ma Bell was a terrible idea. I just loved having to pay rent on every phone in my house every month, because you weren't allowed to own your own phone.

    You know nothing.

  4. Re:Every Network Is Different by tepples · · Score: 3, Insightful

    I'm not sure why we put up with it

    Because most people who consider a mobile phone in the United States find it preferable to the alternative: no phone service and no handheld device.

  5. Uh... by oldhack · · Score: 3, Informative

    My 4-band Nokia GSM phone worked fine with AT&T and T-Mobile.

    Well, I basically just make voice calls, so maybe that's the issue...

    --
    Fuck systemd. Fuck Redhat. Fuck Soylent, too. Wait, scratch the last one.
  6. Re:Forcing phone companies to offer all plans mont by h4rr4r · · Score: 3, Interesting

    So buy the phone you want, then get the contract and swap the sim into the phone you wanted. Now sell the "free" phone on ebay.

  7. "analyst"? by iamagloworm · · Score: 3, Insightful

    he has analysed nothing. how much money these "analysts" are paid for stating the bleeding obvious is beyond me. this should be under the no-shit-sherlock dept.

  8. Re:LTE either? by jra · · Score: 3, Interesting

    [ reads piece ]

    Oh: "Andy Seybold Guesses".

    Got it.

    Hey, Andy? LTE *isn't* 4G; ITU says so.

    Andy underrates RF technology; if Vzn can deploy LTE robustly, things will get very interesting.

  9. Spectrum issue by thogard · · Score: 4, Informative

    NATO split up the spectrum after WWII so that European military radios were on the US civilian frequencies and vice versa. The reason was so the US military could take its radios into Europe and use their default channels and not conflict with the allied military radios that were already there.

  10. Discount for no subsidy; coverage; restocking fee by tepples · · Score: 3, Informative

    Most of the phones I've ever owned have been unlocked, purchased direct from Nokia.

    For one thing, only T-Mobile has a discount for bringing your own unlocked phone rather than taking one of the subsidized phones. AT&T has no counterpart to T-Mobile's "Even More Plus" plans that knock $10/mo off voice or $20/mo off voice+data for purchasing the handset and SIM separately. But other Slashdot users appear to be of the opinion that T-Mobile has the worst coverage among the big four. For another, before I buy an N900 phone from Nokia, I want to know whether I will like it so that I'm not out $80 for return shipping and restocking fees for a phone that I turn out not to like.

  11. No, Samsung uses them by mmj638 · · Score: 3, Informative

    No, Samsung use them.

    According to w'pedia:

    As of January 30, 2009 Micro-USB has been accepted by almost all cell phone manufacturers as the standard charging port (including HTC, Motorola, Nokia, LG, Hewlett-Packard, Samsung, Sony Ericsson, Research In Motion) in the EU and most of the world. Worldwide conversion to the new cellphone charging standard is expected to be completed between 2010 to 2012.

  12. Re:Why should they? by turbidostato · · Score: 4, Informative

    "When the dominant model is to buy the phone with the plan"

    Have you thought that it might be the case that that's the dominant model because that's all the telcos offer?

    Nobody is telling that telcos should gift away expensive smartphones but that you should be able to choose between a locked subsidized mobile with a data plan *or* a cheaper data plan without the mobile.

  13. The problem is not locked vs unlocked by PsychicX · · Score: 4, Insightful

    It's popular to talk about why 'unlocked' phones, but I would wager that the vast majority of unlocked phone buyers do not care that the phone is unlocked. It's irrelevant. We're not planning to switch networks. It's the contract that is the problem. Locked phones are fine as long as they're off contract. And off contract is exactly where cell companies don't want their customers to be.

  14. Re:Every Network Is Different by Ken+Hall · · Score: 3, Insightful

    There was a lot more to it than this. AT&T was prohibited from being in certain markets (computers) because of the "regulated monopoly" status. They had fantastic technology available via Bell Labs, but they couldn't sell it directly. They also had UNIX. They owned it. But they couldn't make money off it.

    The government wouldn't let AT&T sell computers because it was believed they would have an unfair advantage in the marketplace if they controlled everything from end to end. They could make their computers work better or cheaper on their networks. Few people remember now how much it used to cost to connect a third party modem to a Bell phone line. But you could rent a modem from Bell that would plug right in! And then you'd pay, and pay, and pay rent forever.

    The management of AT&T decided it was better for the company to be broken up so they could get the new entities into markets they thought would make them more money than just carrying traffic. At that time, the small computer industry was beginning to take off, and they wanted a piece of that. They wanted to take on IBM, and even without the local providers, they were still about the only company large enough to succeed.

    This isn't about technology, or customer service, it's about BUSINESS. Everyone who owned AT&T stock got shares in all of the new entities, and the idea was that the new entities, moving into new markets, could make more revenue combined than the old monolith. That translates into higher overall dividends, and higher aggregate share prices.

    It's all about "maximizing shareholder value".

    Sometimes in business, you have to think about what your company can be, rather than what it IS. If the railroads had thought this way, they could have been the first into the airline business, but they thought of themselves as RAILROADS, and not as "transportation providers", and by the time they realized what was happening, it was too late.

    The management of AT&T tried to branch out, to get into the game, but unfortunately nobody thought of them as a computer company. They didn't discover how to properly market their new products till they were outclassed by the other players. Their early UNIX boxes were good products that just never sold well.

  15. Whether or not the technical issues are true... by Constantin · · Score: 4, Interesting

    The main point of the article should have been that the EU created a competitive landscape by restricting competitors to interoperability standards that do not exist in the USA - i.e. allowing customers to go from carrier to carrier without the need for a new phone. Here in the US, you are automatically subsidizing a new phone when you sign up for service with any major wireless company - and if you don't use the subsidy by buying a new phone every two years, then you're leaving money on the table. Yes, a waste, but that's what evolved over here vs. the general EU model of the customer providing the phone and the carrier supplying the SIM (though subsidized plans exist).

    Me, I'd prefer the ability to switch carriers and not to have this hidden subsidy. If the phone works and you're happy with it, why quasi-require the owner to chuck it for a new model? Just more e-waste with no tangible benefit except for those that like to further line the pockets of wireless carriers through the use of additional (previously unreachable) services. I also like that the EU mandates that the caller to the cell pays for the call. Seriously cuts down spam calls - because calls to cell phones are 5x more expensive than landline calls. An additional benefit is the possibility of giving a phone to your kid and being able to call them at will - but they cannot make calls unless they refill the SIM bank account.

    Anyhow, IIRC, the iPhone 4 has two external antennas that are nominally tuned to certain frequencies but which through some electronic happiness inside can actually cover a wider variety of frequencies than the one that they are 'naturally' resonant on. So your signal quality on a 700MHz band using a nominal 850MHz antenna may not be great, but it may still work. The current iPhone 4 is capable of handling signals ranging from 850MHz-2.4GHz... so the current design limitations may be just that, limits by design to lock folk into AT&T in the US market. Then again, I don't know enough about all the technologies, compatibility issues, etc. to say for sure that it can be done.

  16. nonsense by evilviper · · Score: 3, Insightful

    The summary is idiotic. The article isn't explaining why unlocked phones can't work in the US. It's merely stating the obvious facts that unlocking an AT&T phone wont work out that well for you right now...

    The big problem? The EU has one standard, while the US has two. The EU standard uses 3 frequencies, while each US standard uses four. Big deal. A trivial technical issue requiring a universal phone to cost 5$ more. They don't exist for one simple reason... the carriers in the US are allowed to lock you in, and its more profitable for them to do so.

    That's not to say it matters. Cell companies do such a good job advertising, that people will complain endlessly about their phone bill, but never switch to some other service with unlimited calling/data for half the price. Even with unlocked phones, their behavor wont magically change.

    --
    Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
  17. Re:And why the US has it easy compared to Canada by Langfat · · Score: 3, Interesting

    Norway and Canada have roughly the same population density yet Norway has nearly double the number of mobile phones per capita that Canada does.

    As a Canadian living in Norway, I can definitively say it's because the laws are stricter here regarding price/competition, and the requirements of infrastructure are much greater on the carriers.

  18. Re:Why should they? by spisska · · Score: 4, Interesting

    There's a bit more to it than that. If you travel in Europe for business, you're going to be visiting different countries. They're all on the same GSM standard, but roaming and out-of-network rates have traditionally been extortionate.

    When I lived there in the late '90s, early '00s, I knew plenty of people who carried multiple phones -- one with their primary number, another with their 'other network' number, and sometimes a third that they could swap pay-as-you-go cards into when travelling.

    When I lived in Slovakia there were two carriers, one owned by Orange the other by DT (later T-Mobile). All outgoing calls were metered. Calls in-network were reasonable but out of network -- i.e. from Slovak T-Mobile to Slovak Orange, cost something like five times as much. Calls elsewhere in the EU could approach 20 times as much.

    The carriers didn't want to sell unlocked phones, but that's what people demanded. Generally you couldn't buy an unlocked phone from a carrier, but if you already had one, they were happy to sell you a SIM.

    Everybody age 16 to 25 either could unlock a phone themselves or knew someone who could. Everyone knew someone that age. Also, most people who wanted one bought an unlocked phone from sources other than the carriers.

    Plus, it was much more common for people to buy the phone and use a pay-as-you-go service rather than get a subsidized phone as part of a fixed contract.

    The carriers wanted a long-term plan system like exists here but the market wasn't interested, for many reasons including those mentioned above.

    But if it cost a US user 20x as much to call someone in another state, things might have worked out differently.

  19. Re:Which is more common? by punit_r · · Score: 3, Interesting

    Think about it. Imagine trying to buy a cable - I could see a handful of iPhone accessories in a 7-11, but probably not a micro-usb cable.

    Normally proprietary cables are bad news, but ubiquity always trumps universality.

    Now what does that tell a person ? Pick one ore more from the below
    (1) Micro-usb sells a lot more than the proprietary apple cable. It runs out of stock sooner.
    (2) Standardization is good. No store keeper finds it lucrative to sell overpriced proprietary cables.
    (3) Standardization allows users to use one cable with multiple accessories. Hence, reducing market demand.

  20. Four-band GSM phones: Use them worldwide. by Futurepower(R) · · Score: 4, Informative

    Four-band GSM phones work fine in the U.S., and all over the world. T-Mobile has a pre-paid plan for 10 U.S. cents per minute for those who don't often use a cell phone. T-Mobile will unlock the phones for you when you have been on their network for 3 months, if I remember correctly.

    When you arrive in Campos do Jordão, Brazil, for example, just buy a SIM card for $7.50 U.S., and you will have a local number to give to anyone you meet there. And, of course, Google has cheap rates to every country, so people in the U.S. can call you while you are in Brazil.

    1. Re:Four-band GSM phones: Use them worldwide. by bhtooefr · · Score: 3, Informative

      That's fine for voice, but what about 3G? IIRC, there's no phone that works on both T-Mobile and AT&T for 3G.

    2. Re:Four-band GSM phones: Use them worldwide. by RzUpAnmsCwrds · · Score: 4, Informative

      That's no longer the case - the Nokia N8 supports UMTS bands I, II, IV, V, and VIII so it will work with AT&T and T-Mobile in the US and with most other providers worldwide.

  21. Market failure due to time-irrational customer by jonaskoelker · · Score: 3, Interesting

    Thing is, companies keep building out to these different standards precisely because consumers let themselves be locked into one or the other, and didn't demand portability.

    Free markets do a lot of things right. Here's a case, in my opinion, of them not working so well: consumers often fail to understand complex issues.

    Understanding that you should pick the ice cream that says "vanilla" on the tin if you prefer that flavor to chocolate is something everyone can do, and the producers and retailers organize themselves according to the amounts demanded across the consumer base.

    Understanding the long-term benefits of buying an open vs. closed platform---or more abstractly, buying a higher-level plan economy vs. free market---is not something people do well. Either that, or they prefer the benefits of closed systems more than I do :-)

    For example, Microsoft likes to say that Windows is an open platform---anyone can write software that goes on top of it and Microsoft can do nothing to control people. The game console market functions differently; there's a lot of top-down control from the platform provider. Similarly for the Apple App Store.

    Similar stories can be told about telecommunication and electricity: someone should operate the wires that make up the basic transmission system. Someone should deliver stuff via those wires (joules, voice calls, datagrams). If you own the base "platform" (wires), you might use that to control what the wires are used for.

    People seem to prefer the iPhone to Android and Android to N900 (and the Freerunner). They like gaming consoles. They seem to be annoyed about incompatibilities and Little Dongly Things (http://www.douglasadams.com/dna/980707-03-a.html) but not do much about it in terms of their purchasing decisions. They tend to discount the long-term advantages of promoting open platforms and the greater amount of innovation that tend to happen on top of them. If people truly have short-term preferences, they're not wrong to do so, but see also Dan Gilbert and Daniel Kahnemann's TED(.com) talks.

    (lesson from DNA: three things had to align; his preferences, the sales rep's understanding of those preferences and the sales rep's understanding of the product. By asking "are you sure?", you're not aligning any of those, you're just making the sales rep even more certain of their wrong conclusion. Instead, ask them directly about their observations, or ask about the same things in different terms, or ask about the negation; i.e. "does it have a power adapter? How does it look? How does it work?" Might help you do family tech support over the phone as well) /ramble (sorry)