Same happened with my M21 and M31 last month and the person and service centre says motherboard needs to be changed, I even tried to run both phones in safe mode. And I heard that this is happening with a lot of people. Didn't expect this from Samsun...
There will be a option to restore your data on you PC or you can restore your data to samsung cloud if you have wifi , personally I use samsung cloud to restore my data
You need to download Samsung's smart switch app on your PC or Laptop , when it's installed you just need to connect your phone to you PC or laptop and run the smart switch app It will automatically detect you phone and there will be an option to go b...