My issue is that my M919 is ONLY getting LTE signal.
I've tried full NB4 stock, GPE stock, various AOSP and Touchwiz based roms - all having the same issue.
I only get basic cell service (able to make phone calls) at work where we are located directly next to the cell tower.
I get home (which is only a short distance away from the office) and I lose the ability to make phone calls, but can still get texts and voicemail (have to use the visual voicemail app though, as I can't dial the vm).
I've verified that if I turn off the LTE part of the radio, I lose signal completely.
I get a decently strong data signal at home, so it's not a strength issue for LTE.
My previous phone was an HTC One (M7) which worked 100% fine at home or work.
My wife's iPhone works just fine.
I've tried flashing both modem.bin and non-hlos.bin for NB4 on this phone (flash, reboot to download, flash again) and this has not restored my signal.
Anyone with any assistance in this matter would be greatly appreciated!