I upgraded my Droid Charge to EE4 Friday night, then another quick update this morning, and since that time I haven't been able to place or receive any calls. The Firmware version is 2.2.1 and the Kernel version is 2.6.32.9. Before the upgrade, I was able to place calls with the 4G network without a problem, but since then I've had the (\) on my taskbar. The strange thing is, it still shows me as connected to 4G LTE most of the time, and I'm usually able to use the data connection including the web browser and marketplace. I don't normally use WiFi, and right now it is disable. In addition, I'm able to send texts without any problem.
Right now, I'm getting 0 dBm in signal strength but out of service in my service state. Whenever I try to make a call, "Network not available" pops up. In addition, when someone calls me the phone goes straight to voicemail. The main screen will say searching for service and battery life has drained very quickly.
I can't think of anything else that I've done with the phone since this time. I tried searching around other forums and in general for similar issues following the upgrade, but I haven't found anything. Any advice for what to do next would be appreciated.