Also a heads up, once your mobile number is successfully changed, you'll receive a text message. Kindly turn off your phone, then turn it back on after awhile. And within 2-4 hours, your mobile number is successfully changed. Also once your mobile number has changed the voicemail box will be deleted and old messages will be lost. Make sure to save the most important voicemails and messages. One thing to keep in mind too is, if you have a T-Mobile account you don't need to register again, and you don't need to create a new password your old password will work to your new mobile number. Also, make sure you save your important call records, it will no longer appear on the My T-Mobile app. And finally, you'll need to wait at least 72 hours before accessing the T-Mobile app with your new number. Are we good with that?