MAKE SURE YOUR WEB IS WORKING PROPERLY (ABOVE INSTRUCTIONS) AS YOU CAN'T HAVE MMS WITHOUT WORKING INTERNET!!!!!
Remove/Uninstall any existing MMS composer you have attempted to setup. Also a good idea to remove any registry keys it may have created that are left behind after the uninstall.
1: Install Arcsoft MMS version 5.0.70.24 from Verzion.
2: Open your Messaging and click on the SMS/MMS option.
3: Click on "Menu" and select "MMS Options" then select the "Servers" tab.
4: Add a new server with the following settings:
Server Name: metropcs
Gateway: wap.metropcs.net
Port number: 3128
Server address:
http://mms.metropcs.net:3128/mmsc
Connect via: SELECT EITHER THE CONNECTION YOU SETUP ABOVE OR "The internet"
Send limit: 399K
5: Click "Done" and then set the new server as default.
6: Using a Registry Editor edit the following values:
[HKEY_LOCAL_MACHINE\SOFTWARE\Arcsoft\ArcSoft MMS UA\Config\mm1\WspHeader]
DELETE KEY -> "X-VzW-MDN"
ADD STRING -> "X-metropcs-MDN"="XXXXXXXXXX" ( Insert your 10 digit phone Number )
ADD STRING -> "X-DEVICE-MIN"="1XXXXXXXXXX" ( Insert your 10 digit phone Number WITH the 1 in front of it )