omg yeah i've been having this issue today! I thought it was just me. I did do a hard reset prior before seeing this. i have an iPhone 5s on T-Mobile (although the iphone was originally purchased from AT&T)
T-Mobile user here and I've been seeing random reboot for the last couple of weeks ... at first I thought it was because I was almost out of storage ... but the reboot still happens after I deleted 20Gb of music from my phone ...
Then, I thought it was Apple Watch related ... I thought somehow when the iPhone tries to update apps on my Apple Watch, it might crash the phone ... but with this report, maybe it's the T-Mobile ...
I did so many hard rest and the reboot always comes back ... my iPhone 6 Plus restarted at least 4 times since this morning ... but I've never seen a blue screen though
This is obviously related to T-Mobile doing something. For the people having a problem: Did you recently click "okay" to accept a carrier update? Also, what is your carrier information listed under Settings->General->About? (Mine says T-Mobile 19.1, but I''m not having any problems).
Oh... no! Not the blue screens, - those are patented brand mark!
Sincerely, iPhone internal components quality seems to have worsened: in my company 2 employee iPhones just died without any symptoms. A third one suffered from random restarts... Of course, Apple sells a lot bigger volume of them nowadays, but still...
Except this is almost certainly on T-Mobile's end... until other carriers have the same issue, it's probably not Apple's fault and therefore has nothing to do with whether or not internal components are getting worse.