I made some interesting discoveries about my radio issues. Thought I might share them.
Like I said before, although I receive incoming texts, outbound texting and calling isn't working.
I do not have LTE service, so I don't normally use a sim card in the phone. During my initial testing, this caused a "No SIM card / Roaming Indicator Off" error which resulted in no signal. The dialer app would just drop the calls before even attempting to connect.
I then borrowed a friend's (AT&T) sim and put it in the Volt. The phone picked up a signal and when I then placed a call, the phone was actually still using my account (via the NV programming) to place the call (Not the SIM's GSM programming - encouraging!)
This leads me to believe that although the phone is programmed correctly, there is some build.prop setting that needs to be changed to allow calls/texts when there is no sim inserted.
I didn't use a sim on LG's stock ROM either, and I still had full service, so that reinforces my feelings that it a software issue.
My next step is to restore my stock backup, extract the build.prop file from there, and then compare it to the CM12 build.prop included in this build. Maybe there is something there that has to be tweaked in order to allow calls without a sim...
If I missed something, please let me know!
