One in Five Mobile Phones Shipped Abroad Are Phoney (theregister.co.uk)
Nearly one-fifth of mobile phones and one-quarter of video game consoles shipped abroad are fake, according to a report by the the Organisation for Economic Co-operation and Development (OECD). The Register adds: The Trade in Counterfeit ICT Goods report, published ahead of the 2017 OECD Global Anti-Corruption and Integrity Forum this month, identified a growing trend in fake goods. Smartphone batteries, chargers, memory cards, magnetic stripe cards, solid state drives and music players are also increasingly falling prey to counterfeiters. On average, 6.5 per cent of global trade in ICT goods is in counterfeit products, according to analysis of 2013 customs data, that is up from 2.5 per cent of overall traded goods found to be fake in a 2016 report. China is the primary source of fake ICT goods, and US manufacturers are the worst affected by lost revenue and erosion of brand value, the report said. Almost 43 per cent of seized fake ICT goods infringe the IP rights of US firms, followed by 25 per cent for Finnish firms and 12 per cent for Japanese firms.
If the product really behaves as what it's being sold as, it's a counterfeit. If it doesn't, it's an outright fake. I once bought a micro SD card that turned out to be fake (it failed, and then the company said the serial number wasn't valid). When buying phone batteries on eBay, I expect them to be counterfeit. They've always worked, though I don't have any good way of telling if the mAh ratings were real.
When I replaced the battery in my Nexus 4 a few years back, I was convinced that _everything_ available was a fake (despite them all touting their "ORIGINAL", "GENUINE", "OEM", etc. status).
I'd have paid 40$ or so for something from a clearly official source, but ended up having to settle for a 10$ China-shipped fake.