I double checked my APN settings and my mms server address is correct.
I read the post you sent me and it mentioned that:
"You might consider trying the fido-core-appl1.apn to see if you are able to send and/or receive MMS as the database appears to have that APN correctly listed. Unfortunately, using that APN would not allow connecting to the LTE networks."
I guess I'll stick with the lte apn and live with it without getting mms.
Have you had the chance to try it with the APN fido-core-appl1.apn to confirm if your MMS services are fully functional? Can you make the switch and try it out?
As a side note, you've mentioned being able to send and receive sometimes.This would indicate that the service is running as intended. We'd like to confirm a few more details just to be sure:
Let us know!