I may still be under warranty. If so, is it worth having my phone checked by genius bar? Or, if a replacement is needed, will I get the same 3GS or will I have to downgrade to the 8gig? I'm having issues with gps,not functioning well. But my main problem is slower speeds and my phone won't dock on my Phillips alarm clock anymore
I would say you have a hardware issue. More specifically in the Dock connector. The downside here is that it might be due to water damage and Apple May/May not cover the replacement. If they don't cover it, they do have a fee you can pay. I think it is $199? Just be polite as it can be up to the Genius as to what direction they take if the damage is due to water. If the damage is from something else other than physicial damage to the area, they will take care of you.