Quote Originally Posted by dr. d View Post
"is it safe?"

also,
googling gave several, similar instructions...
Prepare for the worst hope for the best

We had a Smart Huawei before. I wasn't able to upgrade its FW because Smart apparently put its own branch in it and it's a dead end with no easy way of going back to the main branch. Who knows what else our local carriers put into their units just to lock them in.

iPhones are the easiest to unlock. Just put in a request after the retention period and after a few hours it's done with no further action needed from the user.