"T-Mobile MMS" settings are exactly the same as "T-Mobile Internet" APN (for accessing internet generally) with only difference of proxy address, which is not present in "T-Mobile Internet" profile. [U]What is funny tough, that I don't necessarily have to connect manually with "T-Mobile MMS" profile, as connecting via general "T-Mobile Internet" works just fine for MMS too (despite of having "T-Mobile MMS" profile selected in fMMS options.