I've got my S8 for 8 months now. But lately (2 months now!) when the battery ration got to 15% suddenly my phone's battery drop to zero (even when I'm not working with it) and turn off! I don't know what is the problem.
I'd appreciate if you could help me!
No, I hadn't tried Device Maintenance. I will tell you if it works. But I already have tried to calibrate my phone and it doesn't work! Every time my battery got the 15 % alarm for power saving the phone turn off.