I tried but couldnt find in search. I have 3gs with 4.3.3 n bb 6.15. As expectd, my GPS aint workin. I had heard theres a downgrade to bb on way. Just need the gPs. Plz help

There has been no release of any tools yet to downgrade the 06.15.00 baseband, unfortunately. It's true that the teams are working on one and that some progress has been made, but there have been no public or even internal releases of a tool to do what you're looking for. It's also worth mention that even though they are trying to build one, there is no guarantee that they will be successful. The iPad baseband was advertised as a permanent solution and it really should be treated as such.

If you have one of the very first model 3GS devices (with the 05.08 bootloader/bootrom) it's (RARELY) possible that you can use FuzzyBand in order to downgrade -- but that is a VERY slim possibility, so rare that I really don't have a clear understanding as to why some people are successful and some people aren't, irrespective of their bootloader..

Thank u so very much for the detailed answer. well i m just keeping my fingers crossed. there was some news about LITTLE success by sherif hashim... however he bricked his 3 g.... unfortunately my 3gs has bootloader 6.4 or something like that. i really liked using gps n lets just hope that it starts working... do keep me posted

MuscleNerd did post a tweet a week or two ago that indicated that they have made a positive development in the downgrade process, but also let everyone know that they wouldn't be releasing it until November or so, so there is definitely hope!