To use your T-mobile phone in Virgin network you need to carrier unlock it.To unlock the carrier lock,unlock code is the best method.You can get the unlock code at low cost from the site Prounlocking.com here you also need to specify the Mobile brand,IMEI number of your mobile.Then they deliver the unlock code to you through E-mail.Using that code you can unlock your phone easily.After unlocking it,you can use any GSM network SIM card like Virgin Mobile network.
