Earlier this week MuscleNerd has announced release his 06.15.00 baseband downgrading solution ready for this Sunday (aka Funday). It looks like it would arrive in few hours, according to MuscleNerd' recently tweet.

As MuscleNerd mentions, this is some big news because since the iOS 4.1/4.2.1 firmware those who upgraded to this specie liPad baseband (for unlocking purposes) have been stuck on it, and a majority of people lost GPS functionality upon doing so. With the ability to downgrade back to a baseband prior to 05.13.04 those who upgraded will regain GPS functionality and no longer need to worry about reflashing to 06.15.00 baseband when upgrading firmwares.

stay tuned~

via ijailbreak