[Q] No data connection after installing custom rom- Not an APN issue

I've been looking around for quite some time now and I can't find anyone with answers, so I'll try here.

I recently switched from Cloudy 2.5 to Exodus Nightlies. After setting up the rom, I noticed that I couldn't connect to data. I've had this problem before and it was always just an APN issue. So, I put in my usual APN settings and assumed all would be solved. Quite the contrary, there is still no data connection in sight. I've now cycled through every possible APN combination; toggled data, airplane mode, and LTE; tried "killall rild" command; and did a clean reflash of exodus.

I'm honestly out of ideas aside from a full reset, which I'd like to avoid if possible. I'm hoping someone here can offer some advice.

I'm currently using the following specs:

LG G3 international version (D855)
Exodus Nightlies rom (5.1.1)
Straighttalk service
Latest TWRP
Xposed

Thanks in advance!