G935A Bootloops every 1-2 weeks after un-rooting - Samsung Galaxy S7 Edge Questions and Answers

This is a pretty weird one, so I'm gonna cut to the chase...
Several weeks ago I got my a new phone (Galaxy s7 Edge, AT&T, Qualcomm) and everything was fine. I'd never rooted a phone before and wanted to try it out, even though the Edge was still pretty new. After about 2-3 weeks of owning my phone, I followed a guide to root. The root only worked after a factory reset, so I lost my apps and pictures, but it wasn't a big deal because it was just a couple weeks' worth of stuff. Everything works fine for a month or so, and then most of the apps started crashing. Some, like Google Chrome or Spotify would work, but most didn't. All the services on my phone also stopped. I figured it was a problem with the root and said oh well and factory reset my phone. I set it up normally again and all was well. But then things got weird.
Now, after about 1 week, my phone will do the same thing as when rooted. First Snapchat stops working, followed by a multitude of other apps. Google Play store stops opening, I'm unable to install apps, and several core features of the phone just freeze up. If i try rebooting (how I discovered the issue), my phone gets stuck in a bootloop and I have to factory reset to work again. My phone did this again today after a few times so finally I'm coming here for help. I also recently discovered that factory resetting my phone from the settings app did nothing, as soon as I rebooted it went into a bootloop. So the only way to recover my phone is to factory reset from the recovery mode. It may also be worth noting that I used ODIN to flash the AP, BL, CP, and CSC stock firmware (G935AUCU1APB5 etc...) after I wanted to unroot. I have absolutely no clue what's wrong and any fixes or even an explanation would be greatly appreciated.

go into recovery and try cleaning the caches, there maybe stray bits of old code floating around.

Cosmic Blue said:
go into recovery and try cleaning the caches, there maybe stray bits of old code floating around.
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Yeah I've done that a couple times. I went ahead and did it just now though so we'll see

Related

[Q] Reboots after Lollipop

Verizon Note 3 here, I received the Lollipop ota today and thought no harm in taking it as I was already stuck without root on 4.4.4.
It worked ok for the first couple minutes, then a reboot, then same thing, about 5 minutes and a reboot. Sometimes ~2 minutes, seems using it in any situation made the reboots happen. I did a factory reset thinking that would clear things up. Unfortunately now it is even worse, as it's rebooting anywhere from the first touch to the screen, to about 15 seconds of activity, literally dozens of reboots.
I downloaded the update on my pc and installed via Odin hoping that the ota was just corrupted or some bad luck like that. Nothing changed at all.
It will idle after booting just fine, I just can't do much of anything, every touch of the screen feels like a roll of the dice. Every few reboots or so I can make it to settings maybe but haven't been able to actually change much of anything, not that it would seem to matter here.
I've flashed via Odin twice, cleared the cashe many times, factory reset 3 or 4 times. Am I screwed here? What else to try?
*UPDATE* I flashed back to 4.4.4 with Odin and no more issues. It appears that my device alone is completely incompatible with the new firmware.
I should also note that I tried airplane mode, safe mode, and removing the sd card with no improvements.
After hours of messing with this thing and nearly giving up, not half an hour after I post here for help, I seem to have found a solution, although hopefully not a permanent one. The problem was happening when I would touch the screen, not scrolling ever, but making selections. On a whim I turned off sound and bam, no crashes.
I would still love it if someone had some insight about this problem, or better yet a solution.
I'm not sure yet if it is just the keypress sound that is killing it, or all sounds. I never did have any issues with the stock keyboard clicks now that I think of it, only the menu press sound. In any case it's not every time it made the sound, just half the time or so. Anything anybody could add to this would be appreciated.
*Edit* Not a solution, but it did help.
Well it's not as stable as I'd hoped. More like before the first factory reset now, but still not good at all. The various sounds definitely trigger crashes quickly(menu options, volume pings, mp3 songs from sd card), but regular silenced menu presses do sometimes as well still. Phone also bootloops several times often before it can get booted stable and 100% always crashes immediately if I try to unlock the screen in the first 5-10 seconds after booting up. Not sure if I'll be able to call or text as it's too late to test that atm. I'll update tomorrow, any insight appreciated.
I would say a bad download but I don't remember if ODIN checks MD5 sums (pretty sure it does). I would do a full wipe and reflash the stock image with odin
I am 100% stock not rooted never been rooted 5.0 vzw and I have had a couple of reboots. Never ever had one on this phone before. My old note 3 was rooted but I got this replacement after the root exploits had all been closed.
ehh not all have been closed
What is the root exploit for Verizon Note 3 with 5.0?
recDNA said:
What is the root exploit for Verizon Note 3 with 5.0?
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None at the current time but CVE-2014-8609 seems like it could be some use
I spoke too soon when I said the phone was usable now. At best 5 minutes of light use as anything seems to crash it now. I did get a fresh image and used it with Odin with exactly the same result which makes me think its my phones hardware or something. Just seems crazy that it was working just fine before the update. The reason I pushed to 4.4.4 and lost root is because my phone suddenly started an issue where it would crash when making or receiving calls. It wasn't caused by any new apps or anything, just out of nowhere. I tried everything then updated as a last resort, carelessly I went to 4.4.4 instead of staying at 4.4.2 and lost chance of root, but it solved the problem I was having. I wonder if the issue is related somehow.
I was able to odin back to 4.4.4 and it's working fine so far, I assumed that you would not be able to revert back like the last ota and just tried it as a nothing to lose last effort. This is very important news to anybody that is having major issues with 5.0. Maybe, just maybe I'll try it again if they make an update patch for reported issues.
But for now, 4.4.4 it is for me.
VZW Note 3 update to Lollipop
I just finished the Lollipop update and my phone is working great for the past 30 minutes. Seems a little slower then usual but have had no issues besides my phone locking up after downloading the update, may have been due to my phone running down to 14%, but after removing the battery for 20 secs and putting it back on, phone came back on, I plugged into charger and started the update. Will post later if I have any issues.
I have been trying unsuccessfully through odin to downgrade but it keeps failing in odin, I downloaded the official firmware from sammobile.
Just curious if u r tried reinstalling newer odin? Try different USB port and cable. At this point maybe even try different pc if u have access to 1

SM910F Note 4 5.1.1 Random Freezes and Restarts

Hello there xda.
I have a Samsung Galaxy Note 4 SM910F.
So what is happening to my phone is that whenever I am in any random app lets say reddit or even chrome for example. It will like freeze for a minute or two and then unfreeze.
In more extreme cases it will reboot.
So this happened randomly because I flashed a Stock unbloated 5.1.1 ROM from here back in december and everything was working smoothly and stuff. I had xposed installed and all my apps. Then in February it started with this random freeze/reboot. I had not installed anything else apart from what I had for the last 3 months.
So I restarted the phone, changed the battery and stuff to see whether that will fix it. However it didn't. So I formatted the phone (the soft type) just so I can install another ROM. So I tried another ROM, flashed the correct CP and BL and stuff and then just installed chrome and whatsapp. After an hour or two the same thing happened. So this time I factory reset he phone, like a complete wipe and I installed the unbloated ROM once again with few apps. Same thing happened...
So my last resort was to install Cyonagen Mod. After an hour or two same thing happened...
I don't know what is the problem. I read about some peoples phones emmc failing and thus the freezing, but I am not sure yet.
Please could you guys explain what I should do to fix this?
Thank in advance!
I have the same problem. Starting on mid january. I'm on stock 5.1.1 with root and twrp recovery
Tried backup and factory reset
I went back to stock after I factory reset the phone. And still had the same problems.
People say that its a hardware problem... So I guess I'll have to send it back to Samsung soon.
I think I tripped the knox. I just have to unroot and get it back once again to stock and send it back. I hope that they accept it.
i have the same problem. my model is SM-N910W8 and I bought it from 2nd hand, so no receipt and no prove of purchase.
can I still send it back to samsung to fix it?
same problem as you and now my phone died completely .
my phone was 4 months and he has not supported any longer he died naturally lol.
my operator gave me another free under warranty because the phone had a faulty motherboard and after several back galaxy note 4
This started happening to me a week or so ago and my phone just got stuck in a boot loop after it froze and rebooted. I'm on the latest stock firmware. Tried factory reset, reflashed stock firmware, nothing helps. It still reboots (sometimes it almost gets booted completely, other times it reboots after 2 seconds.
Just disable finger print. Yes that magic feature offered by Samsung is causing more hungry that happiness since S5
EclipseX said:
Just disable finger print. Yes that magic feature offered by Samsung is causing more hungry that happiness since S5
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Many thanks. This was driving me mad for a few days, I had tried three different ROMS, completely wiping everything. I eventually went back to stock, which I'm still running and it was the same; it would run fine for a few hours and then start to lock up until eventually it would either reboot or stop responding and I'd have to pull the battery to restart it.
Just not selecting fingerprint security doesn't work, you have to force stop "Fingerprints" in Application Manager (All).
just do not setup the finger print lol. I was having those problemes too when I bought the note 4 until someone tell "do not setup the finger print" lol, not I'm a happy user.... I hope that android 6.0.1 solve the probleme
HXOY said:
Many thanks. This was driving me mad for a few days, I had tried three different ROMS, completely wiping everything. I eventually went back to stock, which I'm still running and it was the same; it would run fine for a few hours and then start to lock up until eventually it would either reboot or stop responding and I'd have to pull the battery to restart it.
Just not selecting fingerprint security doesn't work, you have to force stop "Fingerprints" in Application Manager (All).
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Click to collapse
EclipseX said:
just do not setup the finger print lol. I was having those problemes too when I bought the note 4 until someone tell "do not setup the finger print" lol, not I'm a happy user.... I hope that android 6.0.1 solve the probleme
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Spoke too soon, it's started rebooting itself again.
Same problems here since 2 days. I was on original 5.1.1 software... Very strange all those people with the same problems
did the problem was resolved ? started to have the same problem 3 days ago ! was on 6- flashed stock with full wipe..nothing ! downgraded to 5.1 with full wipe via odin...again nothing !
WTF [email protected]!
Davids said:
did the problem was resolved ? started to have the same problem 3 days ago ! was on 6- flashed stock with full wipe..nothing ! downgraded to 5.1 with full wipe via odin...again nothing !
WTF [email protected]!
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Still having the same issue around the same time everyone else started experiencing it.
I also was rooted and had xposed installed on 4.4.4 before the issue started happening.
Try the solution provided here & report back..
http://forum.xda-developers.com/note-4/help/note-4-sm-n910f-freeze-restart-issue-t3439111

Massive softbrick (haven't found a solution yet)

Hello everyone,
So here's my story: I got a 6P short after release and it's been amazing. After switching from a S6 I couldn't be happier until 3 days ago.
I was playing around with my phone (checking for updates on the play store if I recall correctly) and I was going to switch from 4g to wifi. I went ahead and pulled down my notification shade and went to press WiFi but misclicked and hit Hotspot which was below it. My phone suddenly froze big time and this is for the first time ever since purchase.
At first I thought I'd wait it out since the device was completely unresponsive, home button didn't work and neither did anything on screen. Buttons didn't make a difference either. 10 minutes went by and I ended up force restarting by holding down power + volume up. First part of my bootup went fine but when it got to the android boot animation after I put in my pin to allow the device to start it dropped from the smooth usual framerate down to 1 frame every 10-15 seconds and it slowed down further until it came to a complete halt around the time the android letters appear.
My first thought was corrupt rom so I went ahead and wiped data from the stock recovery. I was running completely stock with no modifications whatsoever. That didn't do anything. Phone still froze in the same boot phase. Desperate I unlocked bootloader to flash a clean fresh image to try to fix it and to my surprise that didn't change a thing.
As I was getting pretty desperate already I had one more idea and that was to flash up to the Dev preview. To my huge surprise it booted and I jumped from excitement. So I started setting up my phone again. I got past the prompt to insert sim card and I was now at the screen to choose a wifi network. As soon as I clicked into that the phone froze up again and at that point I lost all hope.
I wiped data in stock recovery and shut the phone down for the night. On day 3, today I woke up and tried starting the phone and it worked as if nothing had happened. I went through the setup and set up my phone on the N preview. At a certain point I was planning to go back to the latest official build but for now I was happy my phone was back from the dead. Later today I tried to restart my phone to clear all running apps etc and it froze up on boot.
I'm losing all hope that I'll be resolving this myself so I'm reaching out to the community to see if anyone's had this happen to them before and hopefuly for a solution. It's still under warranty so I can eventually send it back to the retailer but I'd rather not have a phone for 3 weeks.
Any and all help is appreciated.
Thank you for reading through my long and probably pretty boring story!
Have you tried flashing the factory image? If yes, did you made sure to wipe/erase the system, boot, vendor, and cache partition before flash the corresponding img files?
To the OP, is there any reason you did not flash to release version 6 instead of Dev preview ?
Also, any reason you can not simply do the "unenroll" from https://www.google.com/android/beta ?
It will require you to setup certain settings again as you will be back to a "factory reset".
DJBhardwaj said:
Have you tried flashing the factory image? If yes, did you made sure to wipe/erase the system, boot, vendor, and cache partition before flash the corresponding img files?
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Click to collapse
DJBhardwaj, i haven't specifically erased those partitions. I was under the impression wipe userdata along with reflashing did that. I will try that tonight when I get home!
Xdafly, I only updated up to N as a last resort because at first I had a locked BL. I was planning to unenrol but that would've been too late as it self bricked after a restart.
DJBhardwaj said:
Have you tried flashing the factory image? If yes, did you made sure to wipe/erase the system, boot, vendor, and cache partition before flash the corresponding img files?
Click to expand...
Click to collapse
Well I just did the erase thingy and my phone booted but wifi won't turn on. Enabling hotspot doesn't brick anymore but I now suspect WiFi might've been the issue. Any tips on how to find out what it could be and possibly fix it?
Edit: 2 restarts and a factory reset later I'm back to bricked same way as before.
try safe mode
mr.dj26 said:
try safe mode
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That was my first thought, that was the restart that bricked it again. Safe mode shouldn't have made a difference since I hadn't even logged into Google account for apps.
After reading the very first post; sounds like bad WiFi hardware.
All the hanging has been related to WiFi or Hotspot.
I think you should get a replacement
Sent from my Purified NexusixP
If Someone Helped You Then Dont Just say Thanks...Hit The Thanks Button!
Is your phone rooted and did you install Xposed?
Over the weekend I shutdown my 6p (stock rooted with April security patch, Xposed v80) and charged it. When it turned it back up I kept getting "Unfortunately, nfc service has stopped". Long story short: I ended up factory reset my phone and reinstalled EVERYTHING and I still got into bootloop. Then I came across
https://github.com/rovo89/Xposed/issues/113
https://github.com/rovo89/android_art/issues/28
At the end of the second post rovo89 (developer of Xposed) fixed the bug in V83. I wiped my 6p once more and installed everything with v83. Problem solved.
Good luck!

Reocurring Boot Loops, Hardware?

Hey all! I'm having a strange issue regarding boot looping that I can't seem to find an answer to on here or anywhere else, I hope you guys can help.
So my T-Mobile Samsung Galaxy S5 (SM-G900T), purchased in May 2014, while perusing Facebook the other day, randomly shut down in the middle of perfectly normal use and started bootlooping. I had never had the problem before. The device had been rooted for months (I forget what method I used) but it was running a stock Lollipop rom. The first thing I did was factory wipe and cache wipe through Android stock recovery. It worked!... for a couple hours. Then the bootloop started again.
I went and sought a new stock rom, believing that somehow mine had been corrupted, and flashed it via Odin. I also flashed TWRP. Clean wipes, new rom, dalvic/etc. wipes, and booted into stock Marshmallow. It worked!... for a couple hours. Then it started bootlooping again. I went into TWRP and tried to wipe just caches and whatnot, but it wouldn't start again. Long battery pulls sometimes allowed the phone to boot, but it started looping again after ~5-10 minutes.
So I installed the Twisted Lollipop but couldn't even get that to boot. I went back and found the earliest available firmware for my device (as I bought mine right after it came out) and flashed it. Wipe wipe flash wipe whatever, and a succesful boot. It was looking good! I was able to install a number of OTA updates. I was at Android 5.1 when I decided to call it a night and hold off on the further OTAs for today. Today I got up and got ready for work, all's well. As I'm getting ready to leave, I allow Google to update some apps, and begin installing Facebook, Spotify, Cap Metro (for my area's public transit system) and maybe something else, I don't remember. Anyway, as the updates are downloading or installing and I'm checking my email, boom, crash, bootloop.
What's going on here? I've never heard of hardware causing boot loops, but could it be that? I dropped my phone (although protected by a Spigen case) earlier this summer and it cracked the screen-- could it have messed with the motherboard in some substantial way? I had noticed it getting hotter and the battery lasting less than usual, but I attributed that to the device's age.
Any help, any advice, any direction you could give would be extremely appreciated. I don't have the capital to replace the phone right now, and I use it all the time. Thanks folks!

LG G2 D802 Bootloop Problem?

Hi,
I have an old G2 which had lineageOS on it, and I wanted to go completely google free and uninstall google play services and stuff, but it seemed my device wasn't rooted (by checking for # in a terminal). I'm completely new to rooting and flashing and everything. Basically I decided I was going to ignore the fact that my brother had already changed things on the phone and I was just going to try and follow a guide to root it and then put whatever ROM I wanted on. Apparently my phone was encrypted, and this needed to be changed before I could do anything so I tried to do a factory reset. When I did this, I ended up in TWRP, which is apparently installed and tried to do a factory reset in that. It prompted me to install Super User or something which seemed like an easy way to root so I said yes. The problem is, the phone never loads. I left it for a good 2 hours to do the factory reset, then it seemed it was not doing anything so I restarted and messed around more. The result is, it is just stuck looking like it's loading up (I assume that's called a bootloop).
So my question is how can I get this phone back into usable condition, I'm not fussed about finishing what I started necessarily, I just need a usable phone. There seems to be good news in that I can access TWRP (v2.8.6.1), which I guess would be useful if I knew how to use it.
Thanks for any help
EDIT/SOLVED: I managed to get it working by going into TWRP, wiping cache and dalvik, installing a new build of lineageos i had already downloaded, not installing superuser, wiping the cache and dalvik again, and rebooting system, and a fresh start of lineage finally loaded. Doubt that's relevant to many people but thought I'd share anyway.
brokemyG2 said:
Hi,
I have an old G2 which had lineageOS on it, and I wanted to go completely google free and uninstall google play services and stuff, but it seemed my device wasn't rooted (by checking for # in a terminal). I'm completely new to rooting and flashing and everything. Basically I decided I was going to ignore the fact that my brother had already changed things on the phone and I was just going to try and follow a guide to root it and then put whatever ROM I wanted on. Apparently my phone was encrypted, and this needed to be changed before I could do anything so I tried to do a factory reset. When I did this, I ended up in TWRP, which is apparently installed and tried to do a factory reset in that. It prompted me to install Super User or something which seemed like an easy way to root so I said yes. The problem is, the phone never loads. I left it for a good 2 hours to do the factory reset, then it seemed it was not doing anything so I restarted and messed around more. The result is, it is just stuck looking like it's loading up (I assume that's called a bootloop).
So my question is how can I get this phone back into usable condition, I'm not fussed about finishing what I started necessarily, I just need a usable phone. There seems to be good news in that I can access TWRP (v2.8.6.1), which I guess would be useful if I knew how to use it.
Thanks for any help
Click to expand...
Click to collapse
you can access the twrp with the power off button and volume less when the lg logo looses the power on and you press again:fingers-crossed:
---------- Post added at 10:04 AM ---------- Previous post was at 10:02 AM ----------
brokemyG2 said:
Hi,
I have an old G2 which had lineageOS on it, and I wanted to go completely google free and uninstall google play services and stuff, but it seemed my device wasn't rooted (by checking for # in a terminal). I'm completely new to rooting and flashing and everything. Basically I decided I was going to ignore the fact that my brother had already changed things on the phone and I was just going to try and follow a guide to root it and then put whatever ROM I wanted on. Apparently my phone was encrypted, and this needed to be changed before I could do anything so I tried to do a factory reset. When I did this, I ended up in TWRP, which is apparently installed and tried to do a factory reset in that. It prompted me to install Super User or something which seemed like an easy way to root so I said yes. The problem is, the phone never loads. I left it for a good 2 hours to do the factory reset, then it seemed it was not doing anything so I restarted and messed around more. The result is, it is just stuck looking like it's loading up (I assume that's called a bootloop).
So my question is how can I get this phone back into usable condition, I'm not fussed about finishing what I started necessarily, I just need a usable phone. There seems to be good news in that I can access TWRP (v2.8.6.1), which I guess would be useful if I knew how to use it.
Thanks for any help
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Click to collapse
https://www.youtube.com/watch?v=HL1wOPe5pLc

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