Unlock iPhone 3G

2. Second you need to get a Turbo Sim

3. Take the Turbo Sim and put it in the sim tray and then you take your T-Mobile sim card and put it in the tray right on top of the Turbo Sim.

4. wait a minute and you will see that you will get signal and T-Mobile will show as the carrier.

Now you can text (in/out) and make calls (in/out).

5. for internet connection do this:

Go to settings - general - network

Enable 3G (must be off)

Data Roaming (must be on)

Cellular Data Network, and then set the APN settings based off what data plan you have with T-Mobile.

you need to input the following APN:
internet2.voicestream.com
It’s MUCH faster than the one you’re using. Your current configuration is for T-Zones subscribers.

Now enjoy your fully unlocked iPhone 3G.

Also even though your turning on data roaming you will not get roaming charges as long as your on a nationwide plan