Chosen Solution
I’m wondering if I can use an iPhone, or any other phone, that can not be used on particularly carrier, like T-Mobile due to Outstanding Balance etc. with a different carrier, like AT&T or any other carrier? It is possible?
Unfortunately if the phone is turned off for such a reason it is placed onto a blacklist and will not work on any carrier in the US.
It’s possible if your phone is already unlocked. http://www.iphonehacks.com/2016/05/unloc… However, if your phone is locked, then T-Mobile will not unlock it for you. https://www.t-mobile.com/company/company…