I have been having this problem also I think it is a bug in eh03
If you hit power button when the screen is not responding and turn screen off than hit it again and turn it on it will respond when the screen comes on
Good afternoon Krisens,
I know this must be frustrating, as normal phone calls is a primary reason for having a cell phone. Has this issue been resolved? Are you able to place calls? When did you get your device? Per your notes, you've done most of the troubleshooting necessary. Have you tried updating the PRL? (Preferred Roaming List) You can do so by dialing *228 [send], select option 1 to re-program, press END when completed.
If you are still unable to receive calls, please send me a Private Message and I will be happy to personally assist you.