Many sites are pointing to Know Your Mobile as a source for the rumor. That story, however, appears to be a slight embellishment of claims made by FSMdotCOM last week. FSMdotCOM‘s report, in turn, quotes a ModMyi user who noticed portions of MMS functionality in the iPhone OS 3.1 beta and who reportedly received word from an AT&T representative that MMS would be enabled by the end of the month in backing up a previous FSMdotCOM report from early August simply claiming that MMS functionality would be coming “later this summer” after the launch of iPhone OS 3.1.