I have a 15 pro max Recently updated to iOS 18. It was fine for a few days. Randomly it switched in the car during navigation while on carplay. The same day the device displayed 1% battery when it was full and said on the screen non genuine battery was detected, the phone is still original it's not even a year old. Now it switches itself off and won't turn on despite being on charge and doing the soft reset mechanisms. This was the regular version of iOS 18 released to the general public recently. It has major problems
