and entered the following settings, but although I can receive MMS, I always get an error message when I try to send out. Even tried entering the phone number under the format of ++ - makes no difference.
T-Mobile UK
* Access Point Name: general.t-mobile.uk
* MMSC: http://mmsc.t-mobile.co.uk:8002
* Username: user
* Password: pass
* HTTP Proxy: 149.254.201.135
* Port Number: 8080