so im gonna keep it short, i have a iphone 6 tmobile that i just jailbroke and i want to use it on cricket. is it possible to unlock the iphone with the jailbreak for use on crickets network?
They are third-parties, and unofficial services most of the time. I would read their reviews/feedback/interactions, and then decide for yourself. Officially, after the legislation, only the carriers can provide an unlock.