Sending SMS Problem

Just a note that over the last few days I've been unable to send SMS messages to two of my ATT friends. Contacted support and they noted this problem has cropped up over the last couple of days and they are working on the issue. Advice I read somewhere in this user group was to not check the two message options (1) to send location data or (2) map web address with the message. This has worked for me on this issue at this time.