Struggling with Apple Support to Repair My iPhone and iCloud Issues – What Should I Do?

Wow, that's a tough spot you're in! It’s a bummer Apple hasn't managed to pinpoint the issue after all that time. I understand they've suggested disabling certain services, but have they tried to isolate the problem by, say, giving you another loaner? If it happens on multiple devices, that's a strong indication it's an account issue. As for legal actions, it's definitely a valid move given the hassle you’ve faced!

It sounds like you've been through a lot with this phone! To diagnose if it's an iCloud issue, have you tried setting up a fresh start without signing in? If your phone works well for a couple of days without logging into your account, that hints something's wrong with the iCloud sync. Otherwise, it could be hardware-related. It's super frustrating that Apple hasn't found a solution yet. Have you asked them about testing the issue on a different model or doing a step-by-step reactivation of services?

It might be worth trying what I did years ago with an iCloud problem. I turned everything off, wiped the device, and set it up as new, re-adding apps and data one at a time. It sounds tedious, but you might pinpoint if a particular app or file is corrupted causing this issue. So far, it seems like if even the loaner phone had problems, it would confirm that it’s likely linked to your iCloud. If Apple hasn’t given you a refund or credit for your lost time yet, you have every right to consider small claims court!