iPhone XS and XS Max Users Are Reporting Poor Cell and Wi-Fi Reception (theverge.com)
Some users who upgraded to an iPhone XS and iPhone XS Max over the weekend have reported poor cell and Wi-Fi reception and noticeably slower speeds when comparing their new phones to their older models. The Verge: According to users on Apple's support forum, MacRumors forums, and Reddit, the issue appears to be widespread across the country and not limited to any specific carrier. It's a frustrating issue, especially considering that the iPhone XS is supposed to have significantly faster data speeds on Wi-Fi and LTE compared to the iPhone X, according to data tests conducted by SpeedSmart. There's even a new antenna line running along the bottom of the phone as discovered by a recent iFixit teardown, which should have helped with reception. Additionally, folks at r/Apple, the most popular subreddit for iPhone and other Apple related discussions on the site, have corroborated the claims.
You're holding it wrong
I can confirm this. I have an iPhone Xs. Used to never have signal problems standing outside when near the wall where the router is.
I now get no signal outside and severely diminished signal if I leave the room with the router. Anything in the way of the router kills the top of three bars of wifi strength. Cellular data will routinely drop out where I'll just stop receiving anything for a bit until I reboot the phone. I have no idea how much of this is iOS 12 (since it comes with the Xs) and how much is just bad design with the Xs. But so far, for a $1000 phone, I'm really unimpressed.
This is only important if you plan to use the wireless connectivity functionality of the devices.
"You're Holding it WRONG!" comments in 3, 2, 1
Right, but in their defense, Apple kinda deserves it.
Oliver's law of assumed responsibility: If you're seen fixing it, you will be blamed for breaking it.
You can totally fix this just by exchanging your Apple iPhone for an Android iPhone.
When all you have is a hammer, every problem starts to look like a thumb.
Eight years ago, when Apple debuted the iPhone 4, they re-engineered the antenna, making it into a stainless steel band running around the edge of the phone. But the antenna was actually two separate antennas, with a very narrow gap between them. If anything, including your hand, created enough of a conducting pathway between the two separate antennas, reception and 3G data quality reduced terribly. As this Anandtech article explained, "Anything conductive which bridges the gap in the bottom left couples the antennas together, detuning the precisely engineered antennas. It's a problem of impedance matching with the body as an antenna, and the additional antenna that becomes part of the equation when you touch the bottom left.
And so, when asked about the problem, Steve Jobs famously said, "Just avoid holding it in that way."
https://www.wiwavelength.com/2018/09/iphone-xs-and-xs-max-mostly-fail-to.html
https://www.wiwavelength.com/2018/09/antennagate-reduxs-if-so-what-can-apple.html