Hi I am in San Ramon CA and i have an Iphone 4 4.0.1 jailbreak via JailbreakMe anyhow from past 1 hr I have no signal bar at all on my phone but the internet is working just fine does anyone noo What's going on ? I cant even call att they are closed at this hour

Is there anything i can try I have already restarted the phone couple of times no help The internet works fine but I cant text or make or receive any voice calls