Samsung Galaxy S6 G920F No SIM but it shows signal and sometimes reboot by itself. - Galaxy S6 Q&A, Help & Troubleshooting

Hi all,
A person i know have Samsung Galaxy S6 G920F and just in a sudden his phone got turn off and when he try to open it it freeze for a second and restart.
He gave it to a friend and that friend install Android 7 ROM on it but it still freeze and restart.
Then, i download the ROM and flashed it. It is on for 2 or 3 days and no issue happened. But i tried to check for updates and it froze and restarted and when it reopened it continued to check for update and tells me that all updates are installed.
The weird thing that it has NO SIM but it shows signal sometimes full signal.
why it do these things? are these errors known or rare problems?

Stock Samsung Rom? If not make sure you try that.
And that sounds like either bad battery or liquid damage inside phone.
Have you tried factory reset in recovery mode?
No sim and full signal? Completely normal if you have no sim card in there. Not normal if you have a sim card in there. If you can see baseband version and IMEI in settings then your sim reader is damaged (pins).

Related

S7 Keeps (randomly) rebooting

Hi Guys,
My S7 (SM-G930F, Netherlands PHN device) randomly reboots. I cannot use my phone anymore because it reboots somewhere between 5 seconds to max. 2 minutes after it reboots.
What did I do to try to fix it:
1. clear cache + full wipe via the recovery mode.
2. downgrade to stock (PHN via Sammobile and ODIN install) Android 6 rom (and after that upgraded to Nougat 7).
3. Fully charge battery and let it drain down all the way.
- My device is not rooted but original Samsung
- My device does not have a single scratch nor it ever fell down
It looks like a hardware problem to me or am I missing something?
I had the same problem with the Galaxy A5 2017. Couldn't fix it, decided to return it, and even the carrier couldn't fix it so they gave me a new one which didn't have the problem. So, if you're still under warranty, return it.
Hi @sanderh
I had the same problem with my G930F for a week. I left it off for 5 days. After that time I turned it on and it's fine now. Two months without reboots :victory:
No reboots to this day :fingers-crossed:
After one year the restarts returned. This happened while updating to Oreo. I left the phone switched off again for 5 days but the problem remained.
When I made a backup files from phone to PC, I noticed that everything works when the MicroSD card is removed. No reboots. I decided to change SD card - it worked. Formatting the memory card also helped so... I'm enjoying again with the working phone

Xperia XZP frequently reboot

Hi everyone.
Do you konw why my XZP frequently reboot? no sim card signal,。SIM card already inset or power already shut down. sound setting has been stopped. modem version: unknow. somthing like this.
battery level 51%, Is this problem of snapdragon 835?
CHINA HK version :45.0.A.1.244
I'm not experiencing any problems of that kind. Maybe it's carrier or app related or maybe a fault unit. You have to check in this direction to understand to what your problem is related
Try a factory reset. Maybe your ROM is corrupted.
I haven't rebooted my phone in 10 days, did you try the diagnostics? Try a factory reset or repair using companion
Thanks for replying. I have solved the problem.,?
This is my way: shutdown the phone normally,and charging the battery level to 90% (about half an hour.) Reboot the phone.?
I tried many ways including: flashtool forced flash all .Sin to tw rom /cn rom /Malaysia rom, factory resetting, take out SIM card , insert one/two SIM card. All are useless. I think the problem is coming from snapdragon 835 like the Samsung S8 and xiaomi 6.

Galaxy S6 - freezing and rebooting 50+ times a day

I've got a Vodafone UK version SM-G920F that has recently started to freeze, crash and reboot constantly.
I managed to back up my data and perform a factory reset from the Setting page, but it crashed 10+ times during the install process (would freeze at various different stages, either rebooting on its own, or requiring a Vol Down+Power reset)
I'm now on a fresh install, but it's still rebooting constantly. I managed to use it like normal for an hour today, but right now it's just rebooted 3 times and won't even get past the Samsung loading screen without several Vol Down+Power resets.
What other options do I have? And is anyone aware of a known hardware issue that could cause this?
I was considering flashing a different ROM, but I'm scared it would reboot during the process and corrupt something...
robjg said:
I've got a Vodafone UK version SM-G920F that has recently started to freeze, crash and reboot constantly.
I managed to back up my data and perform a factory reset from the Setting page, but it crashed 10+ times during the install process (would freeze at various different stages, either rebooting on its own, or requiring a Vol Down+Power reset)
I'm now on a fresh install, but it's still rebooting constantly. I managed to use it like normal for an hour today, but right now it's just rebooted 3 times and won't even get past the Samsung loading screen without several Vol Down+Power resets.
What other options do I have? And is anyone aware of a known hardware issue that could cause this?
I was considering flashing a different ROM, but I'm scared it would reboot during the process and corrupt something...
Click to expand...
Click to collapse
Maybe a battery issue?
a friend just gave me his very same model phone with the very same issues.. if I find out anything I'll tell you here, or if you solve it first please write down what you did.
Thanks Vibbuz.
I've been trying to download a stock firmware to flash via Odin, but download speeds from Updato are really bad.
So I managed to flash a firmware after installing Odin on a Windows laptop (painful trying to get it to work on my Mac)
Firmware installed OK, but after boot I was getting a constant "com.sec.epdg" pop-up box that wouldn't let me use the phone at all. Not sure if that's due to the tsar3000 firmware?
Wiped the cache and did a factory reset after booting into recovery, and now it's stuck in a boot-loop again (95% of the time it hangs at the Samsung logo animation)
Just tried using SamFirm v0.3.6 to find the correct file. Downloaded a 4gb file, but several attempts to extract only gives BL, CP, CSC files but no AP (throws up an Unknown Error during process).
So still stumped!
Yet another update. Left Updato running overnight and downloaded a firmware.
Flashed it with Odin, claims to have succeeded but phone then reboots and hangs at "Erasing" stage (Android logo is spinning, then stops)
I'm starting to think it's pretty broken...
I've been having this exact same issue since June. If your phone happens to boot try activating power saving mode (to reduce cpu speed) as soon as possible.
It seems that doing that diminished the frequency in which my phone rebooted. If it also helps you it might be a faulty battery that can't provide enough voltage. (I'm not 100% sure on this part though, just thought of it because of the apple batteries drama)
Please post your results! Looks like a lot of people are affected by this and it would be great if we could find the cause of the problem.
I just read your thread actually! Sounds very similar to mine.
I've got nowhere. I don't think it's hard-bricked as I can still access Odin mode on the phone, and sometimes boots to Recovery, but it freezes and various different points and is currently unusable (either freezes at Samsung logo, "Erasing" part after installing firmware, or once it started to run though new device setup then froze).
Went ahead and bought an S8, but still want to fix the S6!
robjg said:
I've got a Vodafone UK version SM-G920F that has recently started to freeze, crash and reboot constantly.
I managed to back up my data and perform a factory reset from the Setting page, but it crashed 10+ times during the install process (would freeze at various different stages, either rebooting on its own, or requiring a Vol Down+Power reset)
I'm now on a fresh install, but it's still rebooting constantly. I managed to use it like normal for an hour today, but right now it's just rebooted 3 times and won't even get past the Samsung loading screen without several Vol Down+Power resets.
What other options do I have? And is anyone aware of a known hardware issue that could cause this?
I was considering flashing a different ROM, but I'm scared it would reboot during the process and corrupt something...
Click to expand...
Click to collapse
Does it have twrp? Try a non stock ROM and kernel
So did anyone manage to find an issue in this rebooting. I am having the same issue.
damir_nis said:
So did anyone manage to find an issue in this rebooting. I am having the same issue.
Click to expand...
Click to collapse
Hi I have same Problem I send the my s6 for repairmen that Saied me this problem related to mobile Hard drive.
I didn't believe it and try some official rom and a rom from Philippine GLB solve my problem for 3 M/o but now developed as same problem whitout any successful rom installation.
I think this problem from incompatibility google play store version to my rom. please flash a custom rom without google apps and immediately after installation turned off data and Wi-Fi internet after 2 day whit sim card whit out any change in setting can use it.
Hello,
anyone found some kind of solution? Happened to me also - freezing, restarts and then my S6 stopped working.. Sometimes I can boot to recovery menu, sometimes it boots up to android (and then freezes again), but the chances are almost non existing. Service man told me the same thing as @ghasemzm - eMMC failure. Yes, it is completely possible, but i don't wanna believe it, because they only tried to reflash the rom. I've made some "google research" and found that there were some issues in power IC on S6/S6E. Could this be related to it?
ghasemzm said:
Hi I have same Problem I send the my s6 for repairmen that Saied me this problem related to mobile Hard drive.
I didn't believe it and try some official rom and a rom from Philippine GLB solve my problem for 3 M/o but now developed as same problem whitout any successful rom installation.
I think this problem from incompatibility google play store version to my rom. please flash a custom rom without google apps and immediately after installation turned off data and Wi-Fi internet after 2 day whit sim card whit out any change in setting can use it.
Click to expand...
Click to collapse
Will test the theory and let the group know.
So i have installed philipines latest update 6.0.1 i think with PIT file provided on Sammobile.
I have tested it for a day with normal ussage like i set up every other phone and it still continued restarting.
Figured out let me test with no google account signed in and the phone is working perfectly. For a full day.
So i dont know what the problem is but i will try again with google account tomorrow for a day see what happens.
After that will install 7.0.1 uk update with PIT file for it and test with that.
I have the same problem and I am quite sure that it is the mobile hard drive.
I tried to use F2FS but didn't find a working rom for that.
Samsung refused repair because of root.... Never Samsung again!
same issues here - any solutions found? My best guess is hardware fault...

[HELP] My J3 Emerge from Boost Mobile keeps turning on and off...

I tried several methods before.
First was flashing the modem to work with GSM cards on calls and messages, but no data. I tried getting the MSL somehow but that didn't work. I flashed next TWRP without knowing anything about wiping the cache after installing SuperSU. I had to download the stock firmware again, and it was working stable until it shut down again when I flashed the new modem. I'm not sure what's causing the problem.
Keep in mind that I have two J3 Emerges, the one I'm modding and another one that has a cracked screen which functions very well. And I don't wanna mod the second J3 because of reasons.
EDIT: I just found out that formatting data via TWRP just causes the phone to behave normally, until somehow its connected to something... USB wasnt connected, and I think it has to be because of the phone checking the status of itself, despite being 'custom'.
EDIT 2: Found out, that the phone goes on a boot loop whenever I connect to the internet. Obviously, something must be going on.
EDIT 3: Looks like configuring the network was the issue... DANG. Anyone know of a way to bypass this bootloop?

I inserted AT&T SIM and now my phone is with AT&T

Hello everyone!
Today I did a very stupid thing on my S10.
I found an AT&T sim card on my house becouse my parent bought an iphone 12 pro max on a trip on USA and the phone had this AT&T sim card. I inserted it asked my to restart my phone and now I have every app of AT&T and my mobile data button is not located on the notification panel anymore. Is there any option te bring back my old phone. I dont even live on America.
What have I tired so far:
Factory Reset the phone
Master Factory Reset
Flash With ODIN and Samsung Tool Pro tool
When I flash it finishes sucssesfully but when turning on Installing System Update Fails. And takes me to recover mode when I reboot it shows AT&T logo during boot and its the same.
Can you help me?
Thank You in advance

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