I'm sure that there are many iPhone 3G, 3GS users who are searching for 06.15.00 baseband downgrade news. It is really notorious baseband that can't be downgraded. But it was for now. I have great news for you. There is a hope that you will be able to downgrade baseband 06.15.00 in the near future. 06.15.00 is the iPad baseband and you can update your locked iPhone 3G or 3GS baseband to 06.15.00 and unlock your phone with Ultrasn0w. But! There are a lot of risks in updating to this iPad baseband. Your GPS will be broken, your warranty will be void, it will be impossible to restore your iPhone to original IPSW and it will never be possible to downgrade 06.15.00. But if you have already done this downgrade don't worry, as I said there was good news. This news came from famous hacker and developer MuscleNerd who tweeted that there is a big progress in downgrading 06.15.00 and there will be the possibility to downgrade this iPad baseband to any prior unlockable baseband soon. He also confirmed that the best choose for baseband to unlock will be 05.13.04. Look at he wrote: So you see that it is true and it's not just another rumor. MuscleNerd even advice you to downgrade 06.15.00 baseband to 05.13.04 and unlock your iPhone with Ultrasn0w and fix GPS. And this is amazing! It is great that there are people who are trying to help others in their needs. And Musclenerd is doing fine. We gotta thank him and other developers who are those people who helps us to use iPhone with almost no limits.. Just imagine how you can use your iDevice with unofficial carriers without these guys. So now you can only wait for new updates from us. We will provide you with detailed tutorial in the near future and you will downgrade 06.15.00 baseband to unlockable state. Just stay tuned with geo-location.site and you will be the first who will do that. And use buttons below to share this great news with other especially with those who are looking to downgrade 06.15.00 iPad baseband on iPhone 3G/3GS. Update: New Redsn0w 0.9.14b1 was released to downgrade 06.15.00 iPad baseband to 05.13.04 for Ultrasn0w.