Give a little more info please.
Make sure that airplane mode is off and that the ringer is enabled and turned up (not on silent). Also, be sure that you have a good phone signal in your testing area.
Did you wipe all the caches and data before flashing, the flash the debugFORMAT....zip? (I can link if you need)
Did you flash a different kernel?
What CPU controller are you using and what are your settings?