Wifi gets annoyingly unstable after a few months of use - Samsung Galaxy S7 Edge Questions and Answers

I have an S7 edge (SM-G935F) that currently runs the Superman rom. It has a strange issue where suddenly, out of nowhere, wifi stops responding. It has done this before, but then it was on stock rom. It was actually one of the reasons I reflashed it. After flashing, everything was fine for 2-3 months and then it started acting up again.
It's so bad that I now mostly run it on 4G (luckily I have a 35GB plan) because it can take upto a full minute to get it to respond on wifi after it's been sleeping.
As far as I can tell, the problem manifests itself like this:
* Phone has been unused for a while, wifi is on, wifi is connected to a network (problem is not network specific)
* I try to open any app that uses data, no response. If I just keep hammering retry/refresh/update etc it starts responding after anywhere between 20-60 seconds.
* During the non-responsive period the wifi-icon sometimes gets the little exclamation mark, but not always.
* After a period with wifi off it sometimes uses 20+ seconds to refresh and connect to a known hotspot.
I can probably fix it again by reflashing another rom, but I'm afraid the problems will be back in another few months.
Any suggestions on what I can try (besides returning it, I'll do it if I have to, but I'd rather not). Are there any wifi logs I can check after the problem appears next time. (I know how to use a terminal)
Anything
--
Rom: Superman Rom 2.4.1
Baseband: G935FXXU1DQGC
Kernel: 3.18.48-SuperStock_SM-G935F_V2.4.1
--

Install the stock rom. It was your faulty custom ROM if all get back to normal.

Sure, I can do that. But you did see that the problem existed before I installed the custom rom right?
The original manifestation of the problem was the reason I flashed another rom in the first place.

Related

Temperamental...

My G1 has recently started playing up. The problems first started with cyanogen 4.1.9999 - it would loose signal, but a reboot sorted this out and it may only happen once every two or three days if that. It was an unstable ROM, no biggy.
But then one day, after rebooting, it got stuck at the android screen then just turned itself off. This repeated several times before it just wouldn't turn on. I left it for a while and tried again later, it turns on, boots but no signal. Rebooting did nothing.
I reflashed (without wiping) cyanogen 4.1.999. and everything seems okay. But then the phone started crashing and rebooting rather a lot, and rather unpredictably. So I wiped, flashed the ADP rom and then cyanogen 4.2.1 rom. This process was a massive brainache - plugging in the usb cable managed to crash the phone within 2-5 min guaranteed, it automatically rebooted.
So here I am. Cyanogen 4.2.1 - after a complete sdcard format, wipe, ext3 repair and flash. The problems still persist! But it's temperamental, a lot of the time I loose signal still, it often reboots itself and hates anything plugged in the usb when it's turned on - making charging the thing awkward.
I used the log collector app to get these logs
http://nopaste.info/17b5351296.html
http://nopaste.info/2e98b9d044.html
At some point during those logs, the signal is lost. The log collector doesn't seem to retrieve a very long backlist, these were taken minutes apart but don't overlap, so I haven't caught a crash. I'm not sure if there are better ways to view logs/debug?
But it's all very temperamental. Occasionally it boots up and life is fine. But more often than not it will loose signal and reboot itself somewhere along the line.
Has anyone come across anything like this before? When it looses reception if I manually try an connect to a network it will say
"This SIM does not allow a connection to that network"
Click to expand...
Click to collapse
I've read that could perhaps be a problem with the sim... but the sim wouldn't cause reboots would it?
Any advise would be great. I bought the G1 off ebay just under a year ago, so no warranty.

[Q] A500 has developed freezing "issue"

Hello,
ok, I gave up on moving APPs to external SD on ICS 4.0.3...
Here is my new issue in a nutshell....
I updated to ICS 4.0.3 with no problems and everything worked fine for months. Within the last month, the tablet has developed a random problem, usually 30-90 seconds after it boots, where it may or may not freeze up (i.e. the screen is unresponsive) and I have to turn it oss and reboot and hope it doesn't happen again.
Sometimes this happens one or two times in a row and then its fine, sometimes it will happen five times or more, and then the next boot it is fine, sometimes it works fine on the first boot.
I have removed all kinds of apps and media to make sure I have lots of room and curently have about 5G free. but that didn't fix the issue.
I looked into the GPS txt files being left behind and made sure they are removed regularly, but that doesn't help the issue.
I used a Device Info APP to display what is going on when this happens, and while it doesn't show any APP or process I can see as the culprit, the CPU is being maxed at 100%?
It also seems to have "something" to do with the WiFi, as when it "locks up" the WiFi icon in the tray goes away and when I go to settings it seems stuck trying to turn off the WiFi. But at other times then the WiFi is working fine?!
Also, sometimes if I let it go to sleep for too long, when I wake it up this will happen..
SO... anyone got a clue what this could be?!

[Q] random reboots with janjan 4.4.2 v2.2 rom

I9505 (euro/international, not connected to any carrier)
I used to run samsung's 4.2, it ran fine. later I ran some hacked google 4.3, it ran fine too.
after that I tried 4.4.1, and after many trials and tribulations managed to get it to work, with functional wifi and phone. Not sure if I get LTE, never saw the appropriate letter on the signal bar, but then again I can't vouch for LTE network where I live anyway.
but... started getting random lockups/reboots. typically once or twice a day, when phone is idle. I only notice those as I get a notification from startup manager than boot took NN seconds. twice witnessed this first-hand. once while fiddling with the phone, another time during a call.
screen, button backlight, notification etc all go blank, phone stops responding to any buttons. stays like that for half a minute or a minute. after that responds to voldown-power-home hold force reset and possibly a little later to power button hole power on. if left unattentded boots up after a while too.
a possible hint to what's going on, camera freezes sometimes, when it does other apps, like flashlight, refuse to start claiming that dive is already used.
upgraded to janjan 4.4.2 v2.2, problem still there.
verified that I'm running recommended XXUEMKE modem.
not sure what other flashable parts are recommended. e.g. non-hlos.
can someone who runs 4.4.x on i9505 possible tell me exact versions of all the partitions?
or download said partitions and tell me e.g. md5 hashes thereof?
thanks

HELP REQ - Stock Lollipop Note 3 N9005 - Random Reboots/Wifi-BT Clashes

Hi all,
Having a problem here.
Had my N9005 for about 18 months, never really had any problems with it - or rather, never really required anything of it which might manifest any problems.
I've always used Stock ROM's, soft-rooted.
Never triggered KNOX.
I'm currently running Stock Lollipop (latest Switzerland Open). Everything I'm about to elaborate is also the same using Stock Lollipop (latest UK Open).
I'm rooted on Lollipop using the method compiled by The TAMAS on XDADEV.
I root because my phone is work-critical, and so I use Titanium Backup to keep my data/calls/APN/SMS backed up and to make restoring easy, as well as to disable stock bloatware etc.
The problem may have pre-existed in pre-Lollipop ROM's, but the sequence of changes which caused it to be manifested included my need to update to Lollipop, about 5/6 months back.
THE PROBLEM - First and foremost, the damn phone reboots randomly. I become aware of it because it will vibrate for startup and play the Samsung startup tone and splash screen before booting to normal functionality. It can do this day or night, maybe 3-4 times a day. I have no error messages or warnings, it's done it while in my hand, while plugged in charging, while out and about, in the car, on wifi, on data. MOST times it reboots. SOME times it just shuts off and I don't realise it's off until I go to use it, or get a call on a second phone to ask why I'm not responding to calls or messages.
When it reboots itself, if I go to the Samsung Battery control panel pane and take a look at the battery chart it will show a gap which is longer than the time it took to reboot, and a shift in the battery meter level.
But, that's not the only possible symptom or problem with the phone.
I've noticed also that my WIFI does a lot of crapping out, or slowing to a crawl, even on my home AP. I've reset AP's, reset networks, reset the phone, forgotten and then reattached the AP in WiFi Settings. So I downloaded the Ookla Speedtest App, to see this issue in black and white, and sure enough, even though any other Android or iOS or Windows or OSX device in my place can connect via Wireless AP to my fibre connection and get great consistent throughput, the Note 3 can often appear crippled...
At it's best, it responds to ping quickly on the Speedtest app, and leaps up to the 30-40Mbps range with consistency for download, and up to 17-20Mbps for upload. This is the least I would expect it to do, my target standard.
At it's worst (which can be 'most of the time') it responds slowly to ping, and either struggles to get over 250Kbps download and maybe a crazy Meg or two for upload, consistently, a slow grind; or it may oscillate extremely wildly between slow and high speeds before eventually settling to unacceptably low transfer rates.
Up to press, I've been trying to chase these problems in isolation, believing them to be unconnected.
No success.
I've reflashed several times. I've Factory Reset. I've wiped data and cache. I've reinstalled and restored from Titanium. I've reinstalled and restored nothing but my SMS's and Call Logs. I've reduced my installed apps to bare minimums. I've tried it with a MicroSD installed, and without. I've bought another battery and replaced it. I've tried it in its case and without its case.
Then I started thinking that the problems were all the same thing, and stemming from the same root.
It suddenly occurred to me that my use of the phone changed significantly at the same time as I moved to Lollipop.
I need to be on Lollipop because apps and hardware that are critical to me are Lollipop dependent.
All at the same time, I began using a Moto360, a Bluetooth Receipt Printer and a Bluetooth Credit Card Reader, all of which are deficient in functionality or in some way hamstrung by not using Lollipop.
So I had gone from occasional BT user (maybe PlayerPro plus a BT link to headphones or my stereo occasionally; when needed, BT speakerphone in car) who usually turned BT off manually to preserve battery life, to a constantly connected BT user...
So I went back to Speedtest app, and tried to test the WIFI connection again. Sure enough, it was pitiful. Then I simply disabled BT on the N9005 and ran the test again, and had full 'through the roof' speed ratings.
I've tried this back and forth hundreds of times now, and it is predictable and established. BT is somehow crippling WIFI on my N9005.
I've tried running the phone on either wifi or data only, with BT off, and had a couple of days use at a time without any restarts. Put BT back on permanently, and the restarts resume within hours.
I'll be honest, I've even been cursing and swearing at my BT devices, because BT sometimes struggles to even maintain a continuous connection. I get vibrations all the time on my Moto360 indicating that the phone, which is on my person, has disconnected from the watch again, perhaps just for moments, sometimes for minutes, resulting in the watch eating battery life, trying to get reconnected.
I'm convinced now that all these things are related, and the problem lies somewhere in the interaction between BT and WIFI in my N9005.
It seems likely that I never noticed the problem before because I never required continuous BT connection before the point where I installed Lollipop.
Downgrading the ROM isn't an option. Leaving BT off isn't an option (nor should they have to be, on an 18 month old £600 smartphone).
Does anyone else have experience of this? Has anyone else had problems that they now suspect might be this same problem? Does anyone understand what's going on hardware/software wise, or have experience of a solution to these issues?
I'd appreciate your input urgently, even if only to affirm that I need to go to the inconvenience of temporarily buying another phone to replace this, while I send this away for a warranty repair.
Is this even a recognised hardware fault, or would I just get back an identical unit which is crippled from being able to perform as I expect it?
Please help.

Help - Random Reboot Problem

This is an ongoing, intermittent and devastating problem I have. My phone will be working perfectly fine, then all of a sudden it will randomly reboot. Then it will work for a few minutes or hours, then randomly reboot again. Then for a shorter time and reboot again until the phone basically can't even get through the bootup process without rebooting. It will be essentially bricked for anywhere from 1/2 a day to nearly a week (though it usually manages to get to working for 15 minutes at a time for most of the week. Then, all of a sudden and for no reason I can tell, it will just start working fine again for anywhere from several days to a month. This has been going on for at least 6 months.
It reboots during any manner of activities with the most common being phone calls, texting (I usually use Handcent Next SMS), anything with the keyboard (stock), browsing, swiping on the home screen, etc.. Really anything causes it, including it just sleeping with the screen off. The same problem occurs when in Safe mode, with or without the SD card (using as just extra storage, not phone memory), and with or without the SIM. It doesn't matter if it's plugged in or not. I have noticed what seems to be a greater tendency for rebooting to occur when the battery is low.
I am on T-Mobile (if that matters in any way for OTAs and such) and running the stock ROM without root. I'm about to try a factory reset but that has not been a permanent solution in the past.
so I just did the factory reset and it rebooted during the initial phone info setup (select your language, etc.)... I think it's toast... Does anyone know if this is the sort of thing that can be repaired for <$100 or should I just buy a new phone from ebay?

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