You can use your iPhone On A T- Mobile network through Jailbreaking your phone number. Jailbreaking is a process of unlocking your phone to other networks and applications access.


Requirements:
● iPhone
● Active T-Mobile SIM card


►step 1 Back Up Your iphone By Syncing With Itunes.

►step 2 Visit Www.jailbreakme.com On Your iphone Browser. Move The slider Labeled "slide To Jailbreak" To The Left.

►step 3 Remove Your At&t Sim Card By Inserting A paperclip Into The Small Hole At The Top Of The Iphone.

►step 4 Replace The Sim Card With An Active T-mobile Sim Card And Restart The Iphone. The Phone Will Now Operate On The T-mobile Network.