This guide will show you how to set up MMS manually on your Lumia.
MMS problems should be solved at this point. Please continue the guide if you still cannot send/receive MMS.
Gamma
MMS
three.co.uk
Note: Only the values that are highlighted in yellow should be changed.
mms.three.co.uk
8799
http://mms.um.three.co.uk:10021/mmsc
MMS