Select the device settings icon.
Select Cellular within your device settings.
Verify that your cellular data is on.
Proceed to Cellular Data Options.
Make sure your LTE/VoLTE and Data Roaming are turned on.
Select Cellular Data Network.
Under the MMS section, select APN and enter wholesale.
Select MMSC and enter: http://wholesale.mmsmvno.com/mms/wapenc
Select MMS Max Message Size and enter: 1048576.
Return to the home screen to save.
Turn the device off and back on.