If you sign up with TracFone, AT&T will sometimes carrier lock your phone
If you call TracFone and ask them to unlock you're phone, they will tell you to contact your carrier even though they are your carrier. They have no idea what they're doing and you will be lucky if you can get them to look up your IEME to tell you that it's not in their systems. If you can get them to file a ticket to unlock your phone it will sit unresolved for days because they have no idea what to do with it.
I have never used any At&T services but since TracFone is uses AT&T towers, that allows AT&T to carrier lock the phone, or that's what TracFone customer support finally decided to mention after multiple days of working on this issue.
I can't call your customer support line because your robo answering machine redirects me to TracFones useless customer support and then hangs up. I can't use your online carrier unlock service either because I'm using TracFone. The last time I called, I was able to get to a human by calling your sales department. I was told I was eligible for an unlock and then they hung up on after i waited on hold for about 20 minutes. Please unlock my phone