There are have been a lot of requests on how to unlock iPhone's that do not have working WIFI. There have been a few other tutorials similar to this but often people find them very unclear and hard to work with. I will do my best to make this as simple as possible.
First of all, there are a few things we need to clear up. For this tutorial we will be using Ultrasn0w 1.2.5, this means it will be compatible with the following basebands: iPhone 4 01.59.00, iPhone 3G/3GS 05.11.01, 05.12.01, 05.13.04 and 06.15.00. Your iPhone will need to be jailbroken with either Pwnage Tool, or Redsn0w, this will not work with Spirit.


Tutorial =====  Link 

I am Tested With this one

                                                                        Download