in the UK. 6s Plus out of warranty The phone shuts down randomly even with 50% of power in the phone! The battery won't last a day. I have wiped the phone twice, started from fresh. It's definitely exhibiting random shutdown issues...BUT the iPhone serial is not showing it's eligible for replacement. What can I do? I don't expect to buy a device and have it last for a year. It's defective but out of warranty, so I fear Apple will charge Thanks for any advice.