how to use unlocked iphone for tmobile?

I have an answer for you here. For unlocking your phone, you can employ WinPwn(Windows) or Pwnage Tool(Mac)(Google them). At present, the T-Mobile's cost for unlimited data is $34.99/mobile, no longer than $7.99, as they set up tricks. Their Voice plan starts at $29.99/mo. You can head to a T-Mobile store and they'll be happy to set up your account and give you a SIM card. While you sign up for your plan on T-Mobile, you will be asked for T-Zones data or web 2 go data plan. You are looking for the GPRS / EDGE data plan which will be the inexpensive one - think 6-8 dollars a month.

If you are trading a used iPhone and it is not unlocked then follow these steps to unlock it.

Go to Google jailbreak- Jailbreak provides the facility to run unsigned code on your iphone. This code is not approved by Apple to operate the device.

Your next step is to unlock it. This permits you to put a non-AT&T sim in the phone and activate it.

I hope the answer will solve your query.

Good luck!