From some of the comments here it sounds like you're using a long code (phone number) rather than a short code for your sms messages. The FCC has been cracking

From some of the comments here it sounds like you're using a long code (phone number) rather than a short code for your sms messages. The FCC has been cracking down on the use of long codes in marketing. Not sure about an app like your's though... But you probably should move to a short code anyway. There are also very strong requirements for how opting in, opting out, etc works. http://www.experian.com/blogs/marketing-forward/2013/01/02/sms-compliance-what-you-dont-know-can-hurt-you/ http://www.experian.com/blogs/marketing-forward/2013/01/02/s...