my phone randomly beeps/vibrates frequently when its connected to my macbook. i guess because the connection keeps failing with itunes. it disconnects in the middle of syncs. itunes will recognize it sometimes but then other times i get an error like this: its a 4.2.8 verizon iphone jailbroken with redsn0w. i can eventually update if i try a few times. is this happening to anyone else? i dont have that many tweaks on my phone.