Hello, recently I've been having problems with my Galaxy a71 where I could be on any battery percentage and my phone all of a sudden dies, and it will charge itself while it dies. Does anyone have a solution to this problem?
Does the phone always reboots constantly? If you have time while it's on you can go to...
Settings Accounts and backup Reset (at bottom)
That will be a hard reset
If the phone works OK after that then see how it goes... if its still messing around then go through warranty repair like Aklima advised. Normally when anyone has to go through a warranty repair you would be asked to try certain methods to see if it solves the issue.