iPhone 4 unlocked no cellular data

[urfriendlazy]

hey guys,

so the problem is that my iphone 4, 1.59.00 baseband on iOS 4.1 is acting up. when i get phone calls from people they can't hear me but i can hear them. and the call then fails after a minute or so. but when i use skype to make phone calls, everything works fine. so i tinyumbrella restore to 4.1 and re-jailbroke it using limera1n and then unlocked using ultrasn0w. now im having the same problem PLUS there is no cellular data at all now. so the only thing i can do is use wifi and send/receive text messages. anyone got any advice?

[iPittsburgh]

Why dont you try using pwnagetool to create a custom firmware of 4.2.1 and restore to the custom firmware?