Phone got stuck in a boot loop but is now powered off, not sure what to do now - Samsung Galaxy S7 Questions and Answers

I have only had it for about 16 months now. It is a MetroPCS GS7 so it's a T-Mobile variant if that matters. Never been rooted or modified in a similar way. The same thing happened with my previous phone, a GS4 which never got fixed. I was just using a video downloader app when it suddenly restarted. It only shows the first screen for about 5 seconds then restarts. I have some experience using ODIN and flashing ROMs but I don't know what I should try with a GS7.
After a few tries to get it into recovery, this is what happened. The blue recovery message in the top left showed up but I didn't let go of the buttons this time. Then this rotating white circle showed up and said something like "applying system update". After about 20 seconds then I got a screen with the dead android and it said "no command" below it. Then I don't know what happened but then suddenly the recovery menu showed up. So I picked to just power off so it is just turned off now and no longer in a boot loop. I don't know what to do from here. I won't turn it back on until I get advice on what to do next.

If you just want to fix it without worrying about losing data, see if you can get it onto download mode and full a full stock flash with all 4 firmware files in Odin.
If anything is corrupt, Odin should give you an error message which might be enough of a clue as to where to look next.

OK so I flashed it once and it didn't work, it was still stuck. After that I just gave up on keeping anything and wiped all data. I flashed it a second time and it still got stuck, but after about 10 restarts it finally worked. However it is now on the T-Mobile firmware instead of the Metro PCS one and also I am having weird problems now. I would like to go back to the Metro PCS however I cannot find any firmware for a G930T other than T-Mobile. The problems I have experienced so far is the auto brightness does not work anymore, I have to manually set brightness even when it is switched on, the screen turns on for a few seconds when it's done charging now, and also I restarted my phone to fix an app and then it got stuck in a loop again. It took 10 restarts then worked again, but that is still a problem. I don't even know if I should still be wasting my time trying to fix this. I really don't want to buy a new phone right now but I also feel hopeless in fixing this one.

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Battery Problem? PLEASE HELP!

Before I start I will say I am rooted and have tried multiple different ROMs to make sure that's no the problem. Starting last Saturday, my phone would randomly turn off. I never saw it turning off until today though. I just thought that somehow it had turned itself off in my pocket. However, today I caught it turning off. Right before it shut down, a logo of a gray battery with a USB cable going into it with an exclamation point in a triangle off to the side appeared. Then, when I tried to turn it on, the same symbol showed up and I couldn't even get to the LG logo. An hour later when I tried again, it booted up, no problem. At the time, I was running illusion rom with Rin kernel. After several other times of the phone turning off with the logo and not being able to turn it back on for a half of an hour, I decided to go back to my old backup of illusion to see if that was the problem. The random turn offs persisted. Worried, I flashed the latest cm12 nightly. Things were going great until just 20 minutes ago where the phone turned off accompanied by the symbol. Whaf does it mean? What should I do? Hopefully my phone's not broken cuz I don't think at&t of lg will accept a phone that's rooted and has seen multiple Roms.
update
Today the problem has persisted and the shut downs have occurred at exactly the same times as they did yesterday. I think I might have to use the "return to stock" stuff and send it to LG. I'm pretty sure this is an internal hardware issue since I have tried multiple different Roms without installing any apps and the problem persists. I am going to call LG now and see if they'll replace it. I've also tried a spare battery so that certainly isn't the problem. I'm confused. If anyone knows what to do, please share.
I would flash tool back to stock and start over. That really does fix a lot of weird problems. It has for me anyway.
Just tried reflashing stock. No success.... sending it in to LG next Tuesday since Monday is a Holiday and its still semi-functional so i'll use it during the weekend. Hopefully they wont charge me for it.

Phone won't stop with the vibrations. Dear god.

Was wondering if anyone has run into this problem?
The phone was fine, rooted and everything, for a month give or take. Then all of a sudden, today, it started acting weird.
It was fine in the morning and everything, was able to use wifi, check emails, and stuff.
Then BAM, I tried to make a call, it didn't go through for the first 20 seconds or so. Then connected and a message kept popping up saying Phone is stopped or something during and after the call.
So, I restarted the phone. It restarted fine and everything, got past the 2 Samsung screens. Then hit the T-Mobile screen. and has been stuck on the T-Mobile screen for ~30 minutes now and just keeps vibrating.
It's getting quite hot, both front and back.
Any advice? Stupid Samsung making this a closed system so can't pull out the battery.
Can't even turn the phone off, only able to get to Download screen.
Weird problem.
Is there any way to pull the data and stuff off the phone at this point?
I'm thinking of going the factory reset route and do that to see what happens and see if it will fix the problem. It would probably not retain root am I correct and I would have to re-root again?
I could get into download mode and recovery fine.
You're just in a bootloop. Try holding down power and home.
Sent from my Samsung SM-G930T using XDA Labs
That happened to me like clockwork until I found these fixes here. "Everything has stopped" and then wouldn't not from a restart.
http://forum.xda-developers.com/ver...-to-notes-root-install-xposed-unroot-t3411039
I refreshed probably 4 times thinking something was wrong with my phone until I flashed those fix zips in that thread. Solid ever since.

Galaxy S7 won't turn on but will charge(kinda)

I've had this phone for about 2 months now, and from the beginning, it's had an issue where it would randomly freeze, restart, and get stuck in a boot loop for random amounts of time. Sometimes it would be fine after 2 minutes, sometimes it would need 10. I kept thinking this was a firmware issue - the phone WAS rooted with TWRP installed, but none of my past phones have had this issue and hardly anybody online seems to have had it, either - and just thought that maybe installing a custom ROM would fix it, but never got around to doing so.
3 days ago, my S7 went into a boot loop again, so I just decided to put it down and let it do its thing. After 20 minutes, however, it still wasn't booting, so I booted into TWRP, and cleared the cache and Dalvik cache. Another 20 minutes later, I went into panic mode and started doing Nandroid backups of my stuff. I decided that I had no other choice but to commence with finding a ROM to replace stock. In the meantime, I just plugged it in and let it keep looping, hoping against hope that it would just fix itself like it always did.
About half an hour later, I was ready to install the ROM I'd decided on. I went and picked up my phone, but all that I saw was the screen was black, and the blue notification LED was lit up. I tried holding Vol- + Power to start booting it into TWRP, but nothing happened. The phone didn't vibrate, the screen didn't change, and the LED stayed lit. I tried holding every button combination possible, for even as long as a minute, but the phone refused to respond. I tried plugging it into my computer, but Windows didn't detect anything.
Skip to today, and the phone's battery has long since died(the LED isn't lit up, so I can only assume...), and I just decided to plug the phone in for the hell of it just to see if maybe it would maybe work again. To my astonishment, 2 minutes later, the battery icon came up on the screen, but the charging animation wasn't there. When I held Vol- + Power, the phone actually responded and restarted! Though, it wouldn't boot past the Galaxy S7 splash screen, and when I tried to boot it into TWRP, it went back to being a brick. I let it sit for about 10 minutes, plugged it in, and this time tried to get it into Download Mode, and it worked!
I downloaded the Switzerland version of the G930F firmware, flashed it in Odin, and everything seems to have worked. Odin says it succeeded, but when the phone tried to restart, it got to the splash screen, and after a few minutes, the screen went black again. When I plug it in now, the Galaxy S7 screen will come up, but now I can't seem to get into Download Mode anymore(though, it DOES still seem to respond to me pressing Vol- + Power).
Does anyone have any idea what's going on? I can only seem to find 3 or 4 other threads on various forums about this problem, but none of them have any answers. People just keep saying the usual "Hold Vol- and Power to make the phone restart", but in case I haven't made it clear, THAT ISN'T WORKING.
And before you suggest that I return it to where I bought it for a replacement or refund: I bought this phone on eBay from a seller who said it was in pretty much mint condition. When the phone arrived, there was not a dent or scratch anywhere on the phone, even around the charger port, so I have no reason to believe he was lying. When I asked him about any possible problems with the phone's operational stability the other day, he says he tested it for about 2 weeks, and that he didn't notice anything.
Sounds like a hardware fault, not much else you can do other than flashing stock and factory resetting, which you've done
Considering it had a fault from day 1 it sounds like that fault finally caught up with it
Likely scenario if sent for repair, new motherboard replacement needed

Samsung S6 edge boot loop/restarting randomly

Hello,
I recently changed the LCD of a S6 edge. I installed it and turned it on and it booted up fine. I went to make sure everything was working. While I was playing music it would restart. I thought it was odd, so i was waited til it came back on and started using other apps. Same thing..restart. So, i booted to safe mode. Same thing...restart.
So, I tried factory resetting. After that, it would just get stuck in a endless restart loop cycle.
I have also tried reinstalling the OS using Odin. I ran Odin and it said everything passed. The phone restarts and goes to installing updates.
It gets to 32% every time then it says "erasing". After a few seconds of displaying "erasing" it just starts its endless reboot cycle again.
**EDIT: I should add that it never restarts when it's in the download manger.** So, that makes me think its a OS issue.
*EDIT#2: This is a good video. I did all of this. Got to the 9 minute mark and where his comes on, mine restarts again.
Any help?
Thank you!
back in the latter days of flashing S4 custom roms there would be the occasional user who couldn't boot and it turned out that there was some detail in the roms that didn't work with some 3rd party LCD screens.
check the reviews for what you bought and see if you are alone or not.
the issue with those screens was fixed by the devs so if nothing else you might be able to go custom with it.
3mel said:
back in the latter days of flashing S4 custom roms there would be the occasional user who couldn't boot and it turned out that there was some detail in the roms that didn't work with some 3rd party LCD screens.
check the reviews for what you bought and see if you are alone or not.
the issue with those screens was fixed by the devs so if nothing else you might be able to go custom with it.
Click to expand...
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Hi,
thank you for your reply. I learned about all of this last night lol. so, i'm not exactly sure what you mean. I bought the LCD+frame from Ebay. It stated it was pulled from a working unit.
Could a bad battery cause all these issues? I notice when i power down (only way I can power down is if I Hold POWER+VOL DOWN and select power down) that the LED light stays on.
Hello, could someone delete this thread. I have posted a more detailed thread on this issue.
if it says it's an LCD screen it's not an original part. my point was that some people have had issues booting up roms because of screens.
that was something that was fixed in custom roms though so if you can't another solution a custom rom that works with 3rd party LCD displays might be an option to consider.

Stuck at ZTE recovery

Hello. I have a stock Axon 10 Pro (US version) that ran low on battery today, shut off, and is now stuck in a boot loop. I see the ZTE logo and then it goes to black, restarts a few times more, and then seems to shut off.
I can pull the battery, reconnect it, and boot into ZTE Recovery. I have data on here that I would very much like to save that I haven't backed up in the last two weeks. I assume the data is still there, just having an issue with the OS booting. I'm not sure where to go from here.
Does anyone have any advice on next steps to take?
Does anyone have any suggestions? My phone, for some reason, booted as far as being able to see my phone background image, froze about 5 seconds later, and restarted again. I'm not sure what this is a sign of, but it gives me a little hope that I can somehow salvage this.

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