iPhone 3GS Downgrade with 6.15 Baseband

[Deathrattle]

Hello, I am currently wanting to find a way to downgrade my custom baseband of 6.15 down to its original baseband. I am running a 3GS with 4.1 Firmware and want to set it all back to normal so I can re-jailbreak and unlock on a better firmware and baseband. Is there a way to restore it? I have Battery drain and data usage issues that I want to get rid of and I just want to restore back to original state to start over, Please help...

[Simon]

There is no way to downgrade that baseband. You can fix battery drain issues with SAM though.

[Deathrattle]

I tried SAM but don't know exactly how to use it to get the results I want. Do you?

[i.Annie]

Guide to Activate iPhone 3G, 3GS With Subscriber Artificial Module (SAM) | CrunchiTech

[Simon]

Make sure it says wildcard activated. Thats when you know you are good.