M31s issues

[VidyutVB]

The phone purchased 6 months ago has started have issues of hanging. Today right side a strip width 5mm went white all along length of screen. Had to restart. 

[Sidhabhi]

Once perform wipe cache partition

It changed with Android 11, now you need to plug the USB-C / micro-USB cable along with the combination buttons (Press & Hold the Power and Volume Up button)

you can enter recover mode by doing this
connect ur device to pc by usbc cable
and make sure ur device is visible in computer as logged in
turn off ur device with the cable connected to pc
and now hold power up and switch on button together until the recovery menu pops up

https://www.androidsage.com/2020/12/16/how-to-boot-into-recovery-mode-on-samsungs-one-ui-3-0-android...

check this link also..

And if problem still persists get in touch with samsung

[Samsung_Support1]

Dear Samsung Member,

Greetings from Samsung Customer Support!

To resolve your device hanging issue please visit this link: https://www.samsung.com/in/support/mobile-devices/how-to-restart-the-device-when-freezed-or-hanged/

For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support