Using fMMS on 3 UK network Ok, for some reason I have now got this working. Anyway, the correct setting for MMSC is http://mms.um.three.co.uk:10021/mmsc I have changed it in the Wiki. Filling in and then greying out the "use proxy" fields in the "3" APN seems to work fine; you don't need to make a new "3 MMS" APN. (Using version fMMS 0.3.6)