Iphone 3gs 5.1 with bb6.15 NO service fix 100%

1. Install cydia–

2.Now you will need to launch Cydia so we can add the 3rd party repository UltraSn0w Fixer is hosted in. When Cydia is up and running go into the Manage tab, Sources section, tap the edit button and then the add button and add the following source

3."http://repo.iparelhos.com"

4. With the source successfully added you will need to simply go into the search tab and search for UltraSn0w Fixer.

5.After you have searched for it and see it, install it to your iPhone also and reboot.