Unlocking iPhone 3G on iOS 4.1 [5.14.02 Baseband]

[RonHC]

So basically my friend just got an iPhone 3G but he wants it to run on T-Mobile. I have done some searching and I found a video on the topic
http://www.youtube.com/watch?v=HOIpwIzimw4

Everything seems okay but I want to make sure if its still usable/able to work
The last thing i want to do is mess up my friend's iPhone 3G

The iPhone 3G is already running on stock iOS 4.1 and has the 5.14.02 baseband.

Also, would i have to update to 4.2.1 [in the video] for it to work?

 

[noiceT]

This video doesn't make sense. He claims that you don't need ipad bb, but then installs it in redsnow

Anyway your only option to unlock is the ipad bb.

All the info you need is here:

http://blog.iphone-dev.org/

and here:

http://www.iclarified.com/


Note: you will LOSE your GPS. One of the caveats of this hack.