If you have problems sending MMS to a specific recipient, the error might be at the receiving end.
What you need to do:
An MMS is a message which can contain pictures and other media files and can be sent to other mobile phones and e-mail addresses. If you can't send and receive MMS as soon as you've inserted your SIM, you need to set up your mobile phone for MMS.
Press the new message icon.
Select the recipient
Key in the first letters of the required contact.
Matching contacts from the address book are displayed.