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Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble.
If you cannot remember your password, it unfortunately cannot be recovered. The phone will have to be erased and set up again as if new.
You can do this yourself via itunes, however the itunes program is not compatible with chromebook.
You can do the restore from any itunes program though, on pc or mac, so if you have a friend/relative that has a computer you can borrow, you may do it there.
Alternately you can take the phone in to any apple store, and they'll do it for you.