Originally Posted by
JC786 As a heads up, they wipe all the data on your phone, so make sure you backup everything before you go to the store.
That's just to protect themselves from you complaining that they stole your data. (It used to be a hard and fast "you're immediately fired" rule in my store.)
You can ask if you stay while they're working on it, they can please do it without a factory reset. Some stores will, some won't. (I had the customer sign a release saying that we weren't responsible for any data getting out - if the customer watched the tech working on the phone he should be able to see that the tech didn't access any of his data or install a spy app.)