When I talk to people on my new iPhone 3GS people on the other side can't hear me well and they say I break up a lot. I have tested this with someone elses phone and I it actually does happen. The OS is 3.1.2 w/ Blackra1n Jailbreak w/ Cydia and sn0w installed. I installed sn0w, so I can tether the internet. Any suggestions or comments on how to fix this or why this is happening?