Why does my bluetooth keep cutting off when I play GTA4 online?

May be...

PS3 advice

This can happen a lot with many online games and not just gta4.It could be something nearby causing interference and cutting off the signal.I would recommend the playstation eye camera as that has a built in microphone and you can also use its video feed in several ps3 games.The only downside is all speech from other ps3 players comes thru your tv speakers as obviously you won't be using your headset.This hasn't really been a problem for me though as i simply adjust sound effects and music levels within the game i am using and then it works great.Happy ps3 gaming!