What about subscribe/unsubscribe mechanics?

All subscribe/unsubscribe mechanisms must comply with anti-spam legislation and CTIA guidelines. All Opt-in or Opt-out messages are mandatory and must contain:

• Your brand name
• Campaign description
• Confirmation of subscription
• Message frequency to expect
• A description of the opt-out and help mechanisms such as unsubscribe links, short code stops, or other opt-outs