3G data connection lost after Jailbreakme and Ultrasn0w
I have purchased my new iPhone 4 yesterday, On AT&T and the 3G data stream is quite impressive. Very fast and all that.
Today, I used jailbreakme.com and Ultrasn0w (1.01) to unlock my phone. Then I noticed that my 3G data network is gone, I can no longer connection to 3G data network. Messages show that I don't have internet connection. WiFi works fine.
The only other thing I put in is Winterboard.
I retore my OS and used my backup and (now without jailbreak) everything is fine again.
Did anyone experience this? Appreciate any work around here.