Cellc MMS APN Settings for Ubuntu

Go to Network and open Cellular settings...

Select Carrier & APN and turn Cellular data. Open APN

For MMS settings create Custom MMS APN and enter below information.

MMS APN: mms
MMSC: http://mms.cmobile.co.za/
Proxy: 196.031.116.250
Proxy Port: 8080
Username:
Password:
Authentication:
Protocol: IPv4

Click Activate