After of all problems that I have with my omnia 7 with the set internet and mms, I have made this app that resolve this problem. I give to thanks to sdk of Heathcliff74. This is funtional in all WP7.
The link to downloads this app is this:
the pass of file is:"htcspain". For more information, you can visit the post of first link. If you have questions, I can try to resolve here or in htcspain.