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Hummm... no issues here with my 6 or the wife's 5 on AT&T... Sounds like a T-Mobile screwed up something in their carrier settings.
 
Happened the night before last on my 6 plus 8.3 T-Mo 19.1 and kept restarting. I'm roaming in Brazil with VIVO 3G data and had wifi-calling turned on. Found out that it seemed the phone was restarting when an iOS activity would start in the background - like PhotoStream after taking a photo or iCloud Backup - that required Wifi. So I turned wifi off and the problem went away. Then I found this thread.
My wife's 5s 8.3 T-Mo 19.1 did not have the problem but it turned out hers was roaming on OI and not picking up 3G data so Wifi calling never kicked in. I put back both phones on VIVO 3G and turned back wifi calling on for both. Will let you know what happens. It's already been 15mn and no restart but I did not take a photo. Will try later.
 
Maybe you missed the comments from all the people on here who have iPhones and are on AT&T and Verizon.
Nope - you just didn't read them. Every 'AT&T' user or other carrier said they were having 'miscellaneous' issues with their phone completely unrelated to this blue screen BSOD; that or they said that had an AT&T phone with a T-Mobile sim... if you can quote several 'other carrier' users in this thread that said they were experiencing the EXACT same blue screen BSOD issue, then I will bow out and acknowledge I was wrong.
 
iPhone 5S 64gb on T-mobile; two phones had same problem, loss of data - both replaced by Apple Care warranty! Now on third unit, hoping the same does not repeat. Genius bar not genius about it - blamed all 64gb models! Original was a new unlocked iPhone 5S 64gb from Apple store when they were the rage!
 
What is the carrier verision? My is T-Mobile 19.6 (running 8.4 beta)
This is located under Setting/General/About
 
Was browsing through Gizmodo, and stumbled on a article that other users are experiencing BSOD on iPhone recently on Tmobile network. So I'm here to just offer another data point for devs or folks troubleshooting the issue.

I just had this happen to me yesterday morning, but just once so far:

Occurrence: Wednesday, June 24th, 7:30 AM (CST)
Phone: iPhone 6 Plus, Model A1522
OS: iOS 8.3 (12F70)
Network: Carrier T-Mobile 19.1

Description:
What's strange was it happened immediately while rebooting, after I performed a hard reset, holding the home button and power button simultaneously, which I usually do after completing an series of app updates, to flush the cache, or if I haven't powered down in a week or so, just to make the phone more responsive. If I remember correctly, I saw the typical white apple splash screen, and it then flashed a blue screen for a split second - never making it to the 4 digit password screen, and then the typical white apple logo reappeared and it booted as normal. I've never seen the blue screen prior to yesterday morning, just thought it was just a fluke, but now I'm surprised other folks are experiencing frequent BSODs which luckily, I have yet to experience.

What's interesting is some folks are reporting it's related to the wifi calling, although I have it enabled, the phone does not seem to auto connect to Wifi, after a hard reset, until the user inputs the 4 digit code. It may be that my particular BSOD is isolated from what others are experiencing, just a coincidence that it's happening, or it is part of the problem - perhaps when the phone boots it does attempt to connect - causing the wifi fault/bug to appear.

Although I only experienced this once, I do hope they release an update, whether from Apple or T-Mobile's end to increase stability and address this fault, maybe in a future iOS 8.4.1, as 8.4 is suppose to be released soon.
 
I solved the issue on my phone (iPhone 5s OS 8.3). The problems started when I downloaded updates for 1Password and Facebook Messenger on 6/24/2015.

Steps to stop crashing/phone reset and blue screen:
1) turn off wifi. For some reason crashing only happens when wifi is on.
2) uninstall Facebook messenger and 1Password.

I'm now reinstalling the two softwares to see if the problem comes back.
 
This is not just the T-Mobile version, I have an iPhone 6 Plus purchased in South Korea unlocked back in December, it's the Japan / Korea version where you can't turn the sound off the camera shutter.

I encountered the blue screen with unending restarts a couple days ago.
My phone had no extra apps installed and was completely stock, and it suffered no drops and was actually barely used ever.

Apple Store replaced it here in California right away.

It is now starting to happen on my Sim free 6 purchased at a U.S. Apple Store just recently . Blue screen, and then very strange color freak out which resembles the Atari 2600 ET game grass fields.
 
I don't have T mobile I have AT&T and this happened to me yesterday. I have never seen it before on any of the iPhone's ive owned and I've owned an iPhone since its launch in 07. To me it seems like iPhones are getting ******** by the day... No surprise...
 



tmobilebluescreen.jpg
A growing number of T-Mobile iPhone users are complaining about seeing frequent restarts and "blue screens of death" on their devices, a problem that seems to have begun very recently. MacRumors has received several complaints from readers, and there are also numerous reports of problems on Twitter, Facebook, and reddit.

Affected users are experiencing a split second blue screen that's followed by their devices restarting, and it appears most people who are seeing issues are T-Mobile customers that began having problems last night or this morning.

Known devices with problems include the iPhone 6 Plus, the iPhone 6, and the iPhone 5s, with restarts happening at 10 to 30 minute intervals. Multiple versions of iOS 8 appear to be affected, including iOS 8.1 and iOS 8.3.It is not clear if T-Mobile recently pushed a carrier update that's causing the problem, but a reddit user who spoke with T-Mobile's support staff said that he got the impression that T-Mobile believes a memory problem might be the cause of the restarts. "The sense I got from the technician is that a) they suspect memory problems, and b) they're getting a lot of calls about it," he wrote.

Some users have had success putting a stop to the restarts with a hard reset, and that's the solution that T-Mobile is recommending to customers who call in. If that doesn't work, T-Mobile is instructing customers to clear out their old text messages and do a factory restore via iTunes.

Article Link: T-Mobile iPhone Users Seeing Frequent Random Restarts and Blue Screens
Happened to me twice yesterday but not since. The rest of my family (three other iPhones on TMobile) have not seen the problem yet.
 
"T-Mobile is instructing customers to clear out their old text messages and do a factory restore via iTunes."

Is anyone experiencing the blue screen who has very little messaging activity? Perhaps it's associated with the Messages app database growing beyond a certain size (I think it's just one table!). Mine's > 5gb.
 
Looks like that Windows emulator slipped through the Appstore Police's net again. Probably too busy taking down Pebble and confederate flag images.
 
Beginning Wednesday, my iPhone 5s (32 Gb; iOS 8.3; Carrier T-Mobile 19.1) rebooted multiple times, displaying a blue screen in the process. I performed a manual reset each time. Despite this, incoming phone calls would quit when I attempted to answer them. Tapping 'call back' in voice messages failed as well. Text messaging worked normally.

I rely on T-Mobile's wifi calling feature when home since their cellular coverage is essentially nonexistent in my neighborhood. Turning off wifi calling isn't an option.
 
Running iOS 8.4, carrier version 19.6 on a 6. I had been experiencing reboots until a few weeks ago when I was on 8.3. Not blue screen, just random reboots. I restored as new and the problem went away. Then I moved to the beta. No problems since.
 
Its not only Apple Iphones . My brother has been complaining that his Samsung S5 is doing it to. so its definitely the t-mobile carrier
I have an LG Tablet 7.0 been doing this on 4G to my daughter, watching Netflix,in the car for weeks on AT&T.
 
iPhone 6 here with T-Mo. Blue screen reboots started yesterday morning (6/24). Had maybe 5-6 of those in ~4 hour time frame. Now no reboots for last ~18 hours, or at least I haven't noticed.

I also noticed the phone was very hot around the time it did the reboots, and the battery drained really fast. So it was doing something to consume lot of power.

T-Mo 18.1 on my phone.

I don't have wifi calling enabled.
 
I don't have T mobile I have AT&T and this happened to me yesterday. I have never seen it before on any of the iPhone's ive owned and I've owned an iPhone since its launch in 07. To me it seems like iPhones are getting ******** by the day... No surprise...

turn off wifi...uninstall facebook messenger and 1password..turn off phone..turn it on...enable wifi...is it better now?
 
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