Flashing the old modem to the KK ROM fixed the text sending issues but, of course, breaks many sensors. Anyone else experience this? Like I said, several different ROMs have been tried.
I have tried stock messaging apps as well as GoSMS. All have the same issue. I am using the ATT "phone" APN and all settings are correct.
Also oddly, I'll still receive incoming messages while outgoing is stuck.
Possible Solution: http://forum.xda-developers.com/show...61&postcount=5
HUGE Thank You to forum member dr87!