[5.1.1] can not receive any calls with GSM sim

I finally got brave enough to update from stock 4.4.2 to anything else, I settled with 5.1.1, I've tried a few roms and none of them have let me take calls -- I CAN place calls.

this is using a h2o/ATT sim -- calling works fine using a pageplus/verizon sim.

I've tried global mode, gsm only mode, a few others..

any ideas, anything I should check?