I Had recently installed McAfee mobile security (the free version through samsung). I noticed in my phone log, a few text we sent to this number from my phone today, the fact that they were not initiated by me or recorded in sms messages concerned me. The McAfee app was due to update at that time, and I had the Internet switch off. It seems the McAfee app sends a an sms when it fails to update? Have since removed the McAfee mobile app