Default [Q] 4g calling issue after update

After the ota update to 4.4.2, my phone will only let me make 1 or 2 calls when on 4g and then I can no longer make/receive any calls (until I remove the sim card or sometimes just resetting the radio or clearing the dialer app data then maybe I'll get another call or 2 if I'm lucky).
I'm looking for any help or suggestions. I'm stock, S-On, etc. I've already tried a hard reset... I also reflashed the ota firmware, but had no change.

I found a temporary fix by changing to "gsm only" in the *#*#4636#*#* menu. However, that resets every reboot, and I don't want to be stuck on edge forever.

I would prefer to stay stock, S-On, but I'll take any suggestions...
Thanks in advance

In case it is helpful:
(bootloader) version: 0.5
(bootloader) version-bootloader: 1.56.0000
(bootloader) version-baseband: 4T.24.3218.09
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 4.18.502.7
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: xxxx
(bootloader) imei: xxxx
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0712000
(bootloader) cidnum: CWS__001
(bootloader) battery-status: good
(bootloader) battery-voltage: 4270mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-c6bbb6d4
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0

UPDATE: I have a few more details: I tried to call my phone, LTE turns off (which is normal), but it never rings then the 4g icon disappears for a minute like it crashed somehow.