Issue

[AakashThakur]

M31 is constantly restarting 

[goodthings · Accepted solution]

Kindly reset factory data with backup then try to it's again. If not resolves then go to service center for resolves this issue. It's may be a Motherboard issue. If you like please accept as a solution it's help to others users also, click on 3dots in my reply section and click on accept solution. Thanks.

[AakashThakur]

It was not even allowing to unlock and restarts again. Somehow I manage to go to recovery mode and got in to safe mode. I was able to backup and reset the phone. Which resolved the issue

[goodthings]

Your's most welcome.

[cs_member10]

Dear Samsung Member,

Greetings from Samsung Customer Support!

We regret to hear about your experience with our product. Please believe that this is not a usual occurrence.

Please perform the below-mentioned troubleshooting steps, these may help in resolving your concern.

Note: Kindly use genuine Samsung charger.

1.Disable auto restart function, there are two methods to disable auto restart function:
Settings > General management > Reset > Disable Auto restart (if enabled).

If the issue has not been resolved, then follow;

2.If you are facing this issue after installing any new application, then uninstall that application:
Settings > Apps > desired app > Uninstall > OK.

3.If the issue is still not been resolved then, update software:
Go to Settings > Software update > Download and install > Checking for software update > Software update available > Tap on Download > Downloading updates > Tap on Install now
Note: Your phone will restart after the update is installed.

4.If the issue still persists, then reset the settings:
Go to Settings > General Management > Tap on Reset > Tap on Reset settings.

5.If the issue is still not been resolved, Reset the device:

IMPORTANT:
• Kindly create data backup of your device via SMART switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite.
• Remember google password before resetting the device because it is required during initial setup.
• If you do not remember it, then reset (Forgot password) your google account.
• For this:
• Open Gmail (https://accounts.google.com/servicelogin) > forgot password >Select ""try another way"" > Next > Enter a new password > Next

Please follow the below steps to reset the device:
Settings > General Management > Reset > Temporary cloud backup or External storage backup > tab on Factory data reset (This will erase all data, including files and downloaded apps)

If the issue still persists, after performing all troubleshooting steps, would request you to please visit the service center. Below is the link to find nearest service center
http://www.samsung.com/in/support/servicelocation/

Warm Regards,
Samsung Customer Support