OK so I've never had to do this but the fix for the SMS problem was this:
Dial this *#*#4636#*#*
Should bring up a menu to select network mode
Select cmda/evdo/lte (or the closest option) lol
Then go and toggle airplane mode on/off.
At this point you should be able to text message
Hope this is correct I am going from memory and I never had to do it personally.
Like this if it helps
@justin here ya go!
You will have to toggle airplane mode on and off after reboot as this doesn't survive.