Anyway, when sending MMS, SPRINT DOES NOT HAVE A LIMIT on the network (like AT&T has, VERIZON too) but they put limits on THE PHONE itself which causes the "LIMIT" to appear to be a NETWORK issue... BUT ITS NOT!!!
Took me a WHILE to find this registry setting but I FOUND IT!!! jejeje [I AM CURRENTLY RUNNING THE TANGO V1 8773, by ANSAR]
Go to the REGISTRY EDITOR and navigate to this entry:
The MS entry should have a "Value Data" of "2000", change this to "51200" press "OK"
You should now see the MS entry have "0x0000C800 (51200)"
AND OF COURSE, DONT FORGET TO HIT THE "THANKS" BUTTON IF THIS HAS HELPED YOU!!! JEJEJE