This information may resolve issues with sending text/picture messages.
When sending a text/picture message, verify that the correct 10-digit mobile number or email address is being entered. Make sure the mobile number does not include:
When sending a text/picture message while traveling overseas only 10 or 11 digits are necessary with the exception of India. While in India and sending a text/picture message to an area code:
For modems or data cards, ensure that operator assisted dialing within Windows is disabled. For assistance refer to Disabling Operator-Assisted Dialing.