If prepaid, the device in the request line has been active on the T-Mobile network to unlock for more than a year. This guide provides an overview of everything you need to know to unlock the T-Mobile device. Now you know how to unlock your mobile phone and you can choose your smartphone and network operator so we can unlock the device for you by providing it for a lifetime in the manufacturer database. Here we do it for everyone, provided that all service obligations and other obligations are fulfilled. Broadcaster Pro Software. Financial obligations to the operator are met and your account has a good status. Or try our alternative unlock method Install the latest version of iTunes (make sure you have an internet connection) Connect your phone to iTunes with unacceptable SIM card Restore to iTunes Your phone is now unlocked! Windows Phone Locked How To Unlock. Remember that you do not pay in advance and financially support the carriers, so it reasonable for them to support their customers until they get the money back.