To solve the MMS issue you have to select the appropriate .xml file for your provider, that file contains provider specific-information for MMS, WAP and other stuffs.
Here it's how:
-Dial: ##634# :this will enable MFG, a secret app
-Press the "call" button
-Now the MFG icon is listed on the "programs list".
-On the MFG screen input this password: 277634#*# (translated is appmfg#*#) and press enter.
-Now you can access to many options, tests.....
Go under 7.Engineer Menu then under 6. Other Settings, then choose Set network profiles.
Here guess which one is the correct .xml file for your provider:
I have TIM Italia, so mine is _PROV_TIM_IT_222_01.xml yours should be there somewhere...
tap to select it, wait, then you are done!