Finally, the 6.15 baseband downgrade has arrived! Now you can have your iPhone 3GS unlocked and still have a working GPS! The complete tutorial with download links(hosted on our servers) is in the members section of www.jailbreak4dummies.com
We also added fixes for the most common problems:
1. Baseband didn’t change after the first try.
2. Invalid SIM error.
3. No GPS after the downgrade.
4. No signal after the downgrade.
Email us with any questions at 247help /at/ jailbreak4dummies.com
Thank you for your support!