Does this mean hardware problem?
Hi, I have a serious problem with my iPhone SE which is 2 years old now. For phone calls, the battery drains like 1% per 8 seconds, it turns hot after 4 minutes and at the end of the call, the battery must have drained so much that it enters low power mode. I cannot understand why this is happening, started observing it after installing iOS 13 and moving onto a new network abroad. Restored the phone twice including doing a DFU restore and it didn't fix my problem.
How can it be a hardware problem? I haven't dropped my phone nor drenched it in water been using a Spigen case since the beginning.
iPhone SE, iOS 13