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This is what I don't get, why do phones sold in the US come locked down to a carrier?
Some do, many don't. Many of the ones that do come that way because they are purchased on subsidized contracts and the locking sort of fits in with that at least by association.
 
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This happened once on my 6 plus yesterday. Bought and used in Hong Kong. I thought it was an iOS 9 beta issue because it happened within 15 minutes of installing beta 2
 
I have a T-Mobile iPhone 5 running iOS 9 beta 2, I've had a few resets in the past month or so but no blue screens and not on the frequency that people are talking about. Could it have something to do with wifi calling? Those iPhones are capable of it and the iPhone 5 is not.
 



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

I have iPhone 5s and on AT&T. I have been experiencing this problem frequently as of late.
 
Just had this happen so I did the following. Seems ok for now.

1. Toggle wifi calling off.
2. Restart phone.
3. Turn on airplane mode. Then turn off.
4. Turn wifi calling back on.

Hope this helps. If not, the value of this trick is what you paid for it! :)
OK, probably helps to read more of the replies. :)
 
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Thank god! Thought this was just me.

This started about a month or two ago with infrequent restarts of the phone (iPhone 6 Plus on T-Mobile), but not like a full restart. Goes to black screen, Apple logo comes up, then back to lock screen, all in about 5 or 6 seconds.

However, yesterday I got the first blue screen restart, which was much more like a full restart.
 
My verizon iphone 6 is also doing this, once every two days I get hit with a random restart. It's approaching the 10 months mark I guess.
 
As near as I can figure, this has not been a problem for me in the last 24 hours, however, I did have this problem a couple weeks ago. It was off and on for about a week but then stopped, possibly when I let my phone die without recharging. Never did come back, though that doesn't mean it won't.
 
This has happened to me a couple times in the past week or two. I have an iPhone 6, AT&T, no jailbreak or anything. It's like my phone just suddenly goes black and then restarts itself. No blue screen that I've noticed though.
 
Thank god! Thought this was just me.

This started about a month or two ago with infrequent restarts of the phone (iPhone 6 Plus on T-Mobile), but not like a full restart. Goes to black screen, Apple logo comes up, then back to lock screen, all in about 5 or 6 seconds.

However, yesterday I got the first blue screen restart, which was much more like a full restart.

Actually, that description fits the problem I've been having. No blue screen yet that I've observed.
 
I've been struck with this issue multiple times on my 128 GB iPhone 6 Plus, which was fine until today. Blue screen then reboot; I can usually tell when this is going to happen because my iPhone starts to run quite hot.

Now, after turning off wifi calling and turning it back on, wifi calling won't activate at all, so I have no cell coverage in my house. Great. Also on T-Mobile.

On the bright side, maybe T-Mobile is trying to fix their wifi calling, which could be causing this problem... On the other hand, my iPhone just rebooted again. :-(

UPDATE: Being assisted by a T-Mobile rep on Twitter- hope something comes of this!
 
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I've been struck with this issue multiple times on my 128 GB iPhone 6 Plus, which was fine until today. Blue screen then reboot; I can usually tell when this is going to happen because my iPhone starts to run quite hot.

Now, after turning off wifi calling and turning it back on, wifi calling won't activate at all, so I have no cell coverage in my house. Great. Also on T-Mobile.

On the bright side, maybe T-Mobile is trying to fix their wifi calling, which could be causing this problem... On the other hand, my iPhone just rebooted again. :-(

UPDATE: Being assisted by a T-Mobile rep on Twitter- hope something comes of this!
TForce is helping you? Completely ignoring me.
 
UPDATE: Being assisted by a T-Mobile rep on Twitter- hope something comes of this![/QUOTE]

Tell us what you find out. It sounds like it might be an issue with WIFI calling and the phone having trouble making the switch. Do the ATT and Verizon people with this issue have WIFI calling? I thought it was only on T-Mobile.
 
Been dealing with this ALL day. Never have I thought I'd see the blue screen of death on an iPhone. It has been practically unusable. My wife's iPhone is not doing this. I didn't think about T-Mobile being the culprit so I have been on multiple chats with Apple and they said they could see a "glitch" in the software but the guy would not get more specific even though I told him I can understand computer speak more than just a "glitch". First he told me my 64GB is too full with "only" 3GB available. I told him that's BS as it has been with that available amount for months and I never had an issue. So, next he of course told me to do a master reset and erase everything and restore in iTunes and set it up as a new phone, which is a little drastic and not something I can do in the middle of the week when I need my phone and its contents for work. I did, on a whim, do a hard reset a couple of hours ago and so far, so good.

yeah. absolutely sounds like tmobile pushed a baseband firmware update, broke something, and it requires a reboot to reset variables or whatever. this is completely a tmobile fail.
 
If this is happening with mostly 64gb versions, I remember iPhone 6 64gb had TLC nand storage issues earlier on when it was first launched. So finally maybe the nand storage is breaking down now. Ask for a device replacement from apple store.
 
I just got off the phone with TMobile. The L1 support transferred me to their "apple support" group right away. That group told me that they have received a large number of reports of this.

Their first suggestion was to make sure we are on the latest version of iOS. We are.

Their suggestion was to wipe the phone and do a clean install.

I said not a chance. There is no way I am taking the nuclear option on an entire family's phones which have been working trouble-free for 9 months, when the problem literally just started for us today and seems way more widespread than just a single problematic phone...
 
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