Downgrade 3GS 4.2,1 to 4.0.1

[dbcv]

I have 3gs with IOS 4.2.1 and baseband 6.15.00. I have SHSH saved for 4.0 and 4.0.1. I would like to know that is it possible to downgrade my IOS to 4.0 or 4.0.1 and get the baseband 05.13.04 which come with 4.0 and 4.0.1 IOS.
Your opinion is highly appreciated.

 

[Thomasjtsi]

I'm pretty certain once you're on the iPad baseband... you're there for good. :-(

 

[Jmills87]

There is no way to downgrade baseband.

 

[dbcv]

We heard lots of talk going about the possibility of baseband downgrade from several well known hackers bout the downgrade never came. Are there still any possibility of it? Or the last option is to throw away 3GS and go for 4s to get GPS back.

 

[Jmills87]

On their list of priorities, baseband downgrade is probably one of the lowest.