Re: Which one is it
I used to have an account with Sprint. Once the phone was paid off I told them that I wanted it unlocked. They tried to say that they couldn't. I pointed out that I'd spoke with the device's manufacturer (Apple) and had been assured that they could. They tried to say that it would only talk to Sprint frequencies, so there was no point. I again pointed out that the device's vendor disagreed with them, and in any case that would be my problem, not theirs, so unlock the damn phone. They refused. I pointed out that there was actual Federal law on this point, and the Feds said that once the device is fully paid off the telco MUST unlock it on request. I further said that I had the address of the Feds to which to make a complaint and that my next stop would be said Feds if they didn't unlock the damn phone IMMEDIATELY. They unlocked the phone. I closed the account and took the phone to Verizon, where it did, in fact, work just fine. (Verizon is a whole different level of customer non-support, but that's a different story.) While the phone was at Sprint it would get max speeds of about 8 Mb/s, even with four bars; the same phone, on Verizon, would get 20 Mb/s with three bars. There would be a reason why they want to make it hard for you to move.
I have since left Verizon for AT&T, where the same phone got about 18 Mb/s, and got a new phone there. Verizon attempted to bill me for two months of service _after_ I moved to AT&T, stating that I hadn't paid off the phone. An actual paper letter on legal letterhead pointing out that I'd brought the phone with me and didn't owe them a penny not only got the attempted charges removed, despite their threatening to take me to collections and to repossess the phone, but got me a refund as I'd switched in the middle of the billing period after having paid for the full month. Verizon attempted to bill me when they owed me money.
AT&T have, so far, proved a lot better than either Sprint or Verizon. This is not difficult.