Unlock iPhone 4 4.11

“For those you with a prepaid T-Mobile Sim card.
Prior to activating 5.0. Do any of you get any bars or edge symbol?
Make sure your phone is not connected to Wi-Fi. When going through the activation process make sure you use connect via cellular network
Once you get to activate your iPhone it will fail. At this point you will enter your AT&T MicroSim. To activate your phone
Once the phone is activated turn off automatic carrier by entering the T-Mobile Sim card”