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[TROUBLESHOOTING] Unexpected shutdowns during calls

Hey guys,
I really love my phone, also the ROM (Chroma) so the kernel (Francos). but my phone keeps shutting down during calls. It's really not funny anymore and it's totally getting a pain now, since I have to keep a 2nd phone with me, just to be able to do calls (the hell is my Nexus 6 for?!). I've tried all I could, with a simple fresh ROM without Gapps, with Gapps, with and without my own apps (backed up with Titanium). Just the most annoying thing I've ever had with a phone, and somehow I can't really believe it could be a hardware issue. Or maybe it is, since it's only happening during calls? To be honest, it already happened once during a game.
I'm living in Germany, so I've a PlayStore N6, no carrier labels or so. Just a pure Google Shamu device.
Any suggestions? Any help? Just something to keep my phone working during calls, except of an replacement? Would really love to get that damn thing solved. :crying:

Noone replies? Did hope for some more help. :crying:
The most curious thing is that my phone just simply shuts down (at e.g. 80 % battery). At this moment I'm getting warned about my battery status and the phone shows that it's 0 % battery left. Here's actually what's kinda weird. After immediatly restarting the phone it shows again 80 % battery (sometimes 1 - 3 % less). Redialing again ends up only sometimes with the same procedure.
Since those shut downs don't happen while charging the phone I coudln't even manage to get a Logcat via Android sdk. At least I was able to get a full log with LogCat. So if ANYONE is capable of getting some information out of that log - Let me know, you'ld totally be my man.
Thanks so far and hopefully someone's going to read this and help me.

[Q] Note 3 crashes/reboots about once a day

For the last few weeks, my AT&T Note 3 has started randomly rebooting. It can happen when I'm viewing email, when the phone is in my pocket, or even in the middle of the night when it is just sitting recharging. The rebooting is roughly once per day: somedays more than once, other times it can go over 24 hours. The problem seems to have started after I updated to 5.0. I have tried a factory reset, but the problem came back. I called AT&T support and they said that they've had a lot of problems with Samsung devices after the 5..0 roll out, with random rebooting, or the Bluetooth failing, or the WiFi failing. They said that they need to replace the Note 3, but because it is over a year old I must pay $100 for the replacement through Asurion (I have been paying the insurance fee).
Searching on line has not provided much on this problem. Does the AT&T comment make sense? If I need to replace the phone, shouldn't it be for free because the problem was caused by AT&T?
I'd appreciate any comments.
Note that I realize it could be related to an App I use being incompatible with 5.0, but I need to use my phone for work pretty much constantly, so troubleshooting which one (if any) is not practical.

Mine started doing the same thing about a week ago. Till then it was not having any problems with the 5.0 version.
They need to figure out the problem and push out a update. Otherwise it is like they don't care about us, unless we go out every year and buy a new phone !

Problem solved?
After trying a reset and cleaning checking the battery contacts didn't work, I looked for other patterns. It seemed to me that one of the most common times it rebooted was when I checked my email with the K9 email client - something that is always running in the background, and could have caused it to reboot when on charge overnight.
I uninstalled K9 and that didn't help - the phone rebooted after about 9 hours. However, since that reboot it has now gone nearly 48 hours without rebooting. Maybe I was right about K9 and uninstalling it wasn't enough - I should have also manually rebooted the phone.
The phone has been rebooting at random times, sometimes as short as about 5 hours apart and sometimes more than a day apart. It could be that right now I'm at one extreme and it will reboot randomly today. But if it makes it through tomorrow morning without rebooting then K9 was probably the problem.

It has now been over 72 hours since the last reboot, which does suggest that the original problem was the K9 email client, crashing and forcing a reboot on the phone after the Android 5 update.

Problem NOT resolved!
A few minutes ago, roughly 76 hours after the last random reboot, when I thought that the problem was resolved, I heard the reboot tone coming from my phone that was sitting on the table.
So, while removing K9 reduced the frequency of the reboot, it did not solve the underlying problem.

Use Titanium Backup and backup all user apps and data. Factory reset and reflash stock if you want to take the extra step. Use standard Google and Samsung apps for a while. Do not restore accounts or system data automatically. Removing and reconnecting accounts and clear data for an app in app manager are always good quick troubleshooting options. Restore apps as you need them, if you really need them. Favor stability over extraneous features.
.......................................................
Galaxy Note 3 - AT&T (sm-n900a)

Since I removed K9 and rebooted the phone, it has only rebooted randomly once in 5 days: this was at 72 hours, and now it has been up for 65 hours since then. Trying what you suggest would take weeks, given the current frequency of random rebooting. Plus, my phone is used for work constantly - I couldn't get by with just the Samsung and Google apps built into the basic phone image.
For the moment, I will just live with the phone as-is and hope that Samsung issues a new version of 5 soon.

Now at nearly four days since the last crash/reboot, or only one in seven days. At that frequency, it is certainly not worth the effort of trying to track down the secondary cause (it could take months), now that I know that K9 was the main problem.

It has been a while since I started this discussion, with no conclusion. The phone still randomly reboots - only once all of last week, but then it woke me up on a reboot at 4:30 am this morning, and rebooted again while I was checking Facebook at 7 am.

I'm having a rebooting issue as well with my Note 3. It started about a week ago and will do it many times during the day. I have tried wiping the cache partition, doing a factory reset and the other day I downgraded the software from 5.0 to 4.4.2 and rooted it and froze the over the air update from AT&T but still have random rebooting. I have had the reboot issue with and without the SD card installed so I know that is not the issue either. I was thinking it was a software issue so that is why I did all of the stuff listed but now I'm wondering if it could be hardware. I guess I'm just at a loss of what to try know and was hoping someone on here had any suggestions.

I hope that with your additional post that we'll get some answers. One thing: does it happen when sitting idle on charge too, or only when not sitting idle? In the later case, it could be a simple as dirty battery contacts.

jeffp25 said:
I hope that with your additional post that we'll get some answers. One thing: does it happen when sitting idle on charge too, or only when not sitting idle? In the later case, it could be a simple as dirty battery contacts.
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Click to collapse
It happens both when charging and when sitting unplugged. I even tried swapping the battery for a new one and the contacts and also clean

Well, it was an idea. I did the same thing, buying a new OEM battery and hoping it would help. It didn't. But then again, mine often reboots at night (it woke me up at 4 am this morning), so I knew it was unlikely to be a battery issue in my case.

Yeah thanks for the idea but it seems like I'm running out of things to try

I feel the same. The only thing left would be to wipe out the phone and try it with nothing but stock, non-upgrades, apps. But I use the phone for work, and it can go more than a week between reboots (or less than a day), so that isn't practical.

I might just end up mailing my phone into Samsung to be repaired but now that I have it rooted is there any special steps that need to be done to unroot it? I was just going to do a factory reset and let AT&T android 5.0 do it's update if that will kill the root. I'm not worried about warranty since it is no long under warranty.

Maybe use logcat and letting it run and wait for a reboot to happen so you can see what is going on. However the logs could get big and it might not capture what happens right before it reboots.

Phone keeps rebooting randomly and shuts down when idle for too long (during night)

Hello everyone,
This is my first post on XDA so please forgive me if I'm doing something wrong.
So my story, I got a refurbished unit at Swappa, I updated to the newest version directly (G920TUVU3DOI1) and it was working fine for the first week or so. Then the reboots started happening, I didn't give it too much thought but looked into it anyways.
At first I thought it was a problem with the WiFi and I tried to keep it off for a while, and it did work for a day but again the restarts kept happening, and now with the phone turning off during the night (no apparent loss in battery mind you).
Then I went to rooting and custom kernels.
I installed unikernel v8-0002 through Odin3_v3.10.6 and I tried removing some Samsung apps with TitaniumBackup in case there was some conflict happening but the restarts kept happening.
Then I installed a custom ROM, "XtreStoLite_ROM_v2.4_Deo-Mod-Edition_XXU3COI9_G920-5-F-I-T-W8-K-L-S" to be more specific.
And to my surprise it worked great, no restarts or shutdowns for about 2-3 weeks, it was great!
But then out of the blue the restarts started happening, they started slow, about 2-3 a day.
But after a few days they went to 10-20 and after that 100-200 a day.
Something was definitely wrong. So I installed the original firmware again (G920TUVU3DOI1_G920TTMB3DOI1_G920TUVU3DOI1_HOME) and booted to the stock firmware, restarts kept happening of course (didn't expect them to stop).
So I retreaded my steps and installed multiple other kernels (Unikernel V9, Vindicator, multiple different flavors of them). Also I installed multiple ROMs (Arrow_ROM_v6.0.0, and DN5 - S6 FLAT - EDGE v4 OJ5 - deodex) but nothing seems to work;
I did multiple wipes, storage wipes, cache wipes, factory resets (from GUI and twrp-2.8.7.2-zeroflte) but every time the same thing happens.
I did notice that the phone stutters and freezes, a behavior that I have not experienced before.
I installed CatLog and got multiple log files when the phone restarts but all of them are different and there is no "pattern" to be found (at least in first inspection). I want to upload them but my post count prohibits it.
Please let me know what can I do, I will reply to your questions ASAP so at least I can get some light into what is happening.
Thank you!

I'm in the same boat. Never had a problem before. Received my phone back from Samsung after a screen repair and now, doesnt matter what rom, kernel, patch, it always ends in random reboots. Most often when I'm scrolling or if a page is loading something in the background. It does a lot of hot reboots (not full shutdown and start ups) so its quick but infuriating. Tried everything, slowly losing my patience.
Any idea what it could be? Something related to Knox? Bootloader/Modem?

#3
Hello, I am too having the same problem. Even after a factory reset

Samsung Galaxy S3 GT-i9305 random restarts even in Safe Mode

Hi Guys,
I have this phone for many years, but suddenly the random reboots started approx 2-3 months ago, running originally KitKat 4.4.4 at this time. Before that I was rooted the phone and I supposed it could be something with that. However, flashing back & factory resets didn't help at all, clearing dalvik caches as well. What I tried up to now:
1. Upgraded/Downgraded the bootloader -- no change
2. Tried different recovery modes -- CWM & TWRP(the current one)
3. Different ROMs -- no change, the sudden restarts persist.
(4. Updated the radio -- the signal got quite better)
Three days ago I've upgraded to Lollipop 5.1.1 (the Cyanogenmod 12.1), the same story continued after a while (different applications installed).
There's one thing for sure: flashing the factories always results into a very stable phone at the beginning, installing some more applications leads to the same state -- random and frequent restarts.
I've checked the hardware -- the power button looks ok, it's definitely not the main cause b/c it reboots without touching! The CPU temp & free memory look quite good too.
Now, the current situation is as follows:
- flashed ROM (official one): 2016-03-03 Poland (T-mobile) 4.4.4 I9305XXUFOL2 I9305TPLFOL2 (seems like the most stable till now)
- installed ATK (Advanced Task Killer) -- configured to kill all applications aggressively when the screen goes off.
For me it looks like the ATK helps much, although I don't know the reason. Also, memory checked, I've executed all kind of possible tests up to the phone -- all appears as OK. Also, I don't know if it's related to the issue but I moved all possible apps installed to the SD card. The internal memory has been formatted via TWRP before the last ROM installation... Does anyone have any idea what could be the reason for the sudden restarts? It restarts even in Safe Mode, without any obvious reason and not touching the phone at all. The CPU load at the times of restart is quite low, the temperature as well. I doubt if the RAM is corrupted or maybe the NAND has some bad blocks. Are there any useful utils for tests that could be executed?
PS: I attach some log file, which I gathered once I was running the Cyanogenmod 12.1 (Lollipop). As I stated above the situation is the same when running 4.4.4 and 5.1.1. Sometimes after such a restart, it sticks in a boot-loop (if I boot manually via the GUI in recovery or download mode it will not).
Current versions:
---------------------
Android: 4.4.4
Baseband: I9305XXUFOA1
Kernel: 3.0.31-4282983/[email protected] #1
Build: KTU84P.I9305XXUFOL2
SELinux: Enforcing
Recovery: TWRP
I beg for your help on this! Cheers!

Same problem here...
Hi there
I'm having this same annoying issue with my Samsung GT-I9305. It suddenly restarts without doing absolutely nothing but looking at the screen or scrolling a text or just sending a sms/whatsapp/whatever.... I started trying to restart the phone (nah) turning it off and back on (nah) changing the battery for another one that I have here with me (nah)... After that, I extracted the SD Card and leave the phone only with internal storage (again, nothing happened but restarting randomly). I tried not installing apps such as FB, even Pebble App or just stopped sycronizing my phone with my Pebble Time via Bluetooth, but with the same and well known result: still restarting suddenly. I have noticed that when Google Play detects that there are few apps with a newer version asking to be updated, the phone restarts too! I tried deactivating this option in Google Play, just letting me to decide when and how to upgrade my apps, but It seems that it still detects the app upgrading needs and keep doing it the same way.
About a year ago, I found the same problem with my phone, but in that time it was related to the power button, it seems that it was pressed all the time and the device felt into a rebooting cycle. I check some blogs and I solved the problem cleaning the button with this electronic cleaning spray. I almost drowned my Samsung but I let it dry for a few hours. It worked fine, until now.
My cellphone is still in Android 4.3 (I9305ZHUCNB1) I don't know why I can't upgrade it to a newer version, even when I see that the 4.4 is available for this model. Right now, I'm thinking about change the cellphone and just forget the whole problem. But I'm just exploring again to see if I can find a last solution that tackles this annoying issue.
Did you manage to solve this problem??
Thanks in advance!

Unfortunately not, I had to buy a new phone. I guess the processor or other element suddenly broke, there's no other explanation to me. Also, as you see no any reasonable support in the forum.. Anyway, wish you a good luck with this.

Not so good here too...
Thank you. But unfortunately for me too... Today my phone went black screened suddenly, when booting only got to Samsung GTI9305 logo... I tried to restart through secure mode and the other one you get pressing power plus home plus volume high, and when tried to do a cache cleaning and rebooting it showed some mmcblk failed issues. So I couldn't do so much to revert this situation. I already bought a new phone, not Samsung of course. I have read that some people had the same problem as me just because they let the battery reach a very low level in one opportunity, and something in the internal memory went broke. So it was a great phone, for three years and half, but it's so bad that it fails this way unexpectedly and without any apparent reason...
Yeh... There's no much support here, especially with old flagship cellphones...

fjpp81 said:
Thank you. But unfortunately for me too... Today my phone went black screened suddenly, when booting only got to Samsung GTI9305 logo... I tried to restart through secure mode and the other one you get pressing power plus home plus volume high, and when tried to do a cache cleaning and rebooting it showed some mmcblk failed issues. So I couldn't do so much to revert this situation. I already bought a new phone, not Samsung of course. I have read that some people had the same problem as me just because they let the battery reach a very low level in one opportunity, and something in the internal memory went broke. So it was a great phone, for three years and half, but it's so bad that it fails this way unexpectedly and without any apparent reason...
Yeh... There's no much support here, especially with old flagship cellphones...
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Click to collapse
Sorry for bothering this thread also... I got success by replacing the display!

SM-N950F soft bricked?

Hey all! New here. I just soft bricked my phone, i woke up to it not booting. I tried various fw in Odin, but no success. This is my day to day use phone, I don't have anything else, so I'd like to make it work again ASAP, hopefully without factory reset.

Hi
what manipulation did you do to get there before flashing a lot of stuff in odin?

I've been just pressing the buttons all around, then I read about Odin, so I tried it. Now my battery died, let's see if I can get to wipe the cache...
Update: no success. Is there a way to get it into recovery? the old volume up+bixby doesn't seem to work.

Sometimes its because the recovery itself is error so that button combination is not working..
Charge your battery until full, then factory reset it with odin, let see if that works
But before you do that make sure you download correct fw that match your phone model. dont try all fw available there, make sure you download fw for SM N950F..

Well it worked and it broke again... Back to square one.

Your infos are kinda vague.
Did you modify your phone and it got triggered by user-action, or did it hit the fan by itself?

I think it was a suicide attempt, I never flashed before, only major thing was just a battery change in a samsung service last summer. It's weird, because since last time it turned on again, but seems like the wifi didn't want to communicate, plus as I look back, sometimes it restarted when I touched the wifi or some random setting. Somewhere else I read that it could be a motherboard failure.

fzoli469 said:
I think it was a suicide attempt, I never flashed before, only major thing was just a battery change in a samsung service last summer. It's weird, because since last time it turned on again, but seems like the wifi didn't want to communicate, plus as I look back, sometimes it restarted when I touched the wifi or some random setting. Somewhere else I read that it could be a motherboard failure.
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Click to collapse
This was happening to me too before my phone just started bootlooping to recovery

Well it's been a few months, so a little update: it still reboots sometimes all out of nowhere, but now I have a different problem: tried to log into a mcdonalds app and it says it detects a security issue. Not that i'll cry over it, but definitely interesting. Anyway, I really think this is some sort of hardware issue related to wifi, because every time it started rebooting, about one out of two times i was turning the wifi on or off. Also sometimes the wifi just wasn't available or working, strengthening my thought. As I read on other threads, this is probably some manufacturing/serial issue, that just happens to come forth after all these years. Probably the last time I bought a Samsung...

fzoli469 said:
Well it's been a few months, so a little update: it still reboots sometimes all out of nowhere, but now I have a different problem: tried to log into a mcdonalds app and it says it detects a security issue. Not that i'll cry over it, but definitely interesting. Anyway, I really think this is some sort of hardware issue related to wifi, because every time it started rebooting, about one out of two times i was turning the wifi on or off. Also sometimes the wifi just wasn't available or working, strengthening my thought. As I read on other threads, this is probably some manufacturing/serial issue, that just happens to come forth after all these years. Probably the last time I bought a Samsung...
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Click to collapse
Try changing build prop, ro.config.tima to 0