MMS messaging not working on Galaxy S7 after change from Verizon to Cricket

[Android Central Question]

Just switched from Verizon to Cricket, cannot send/receive MMS messages (GIFs) on S7. All APN set up as required per Cricket instructions, Does this sound like a carrier problem, a phone problem or a sim card problem? Any other suggestions? I have heard numerous issues with Cricket. Thank you.
Jamison