Mobile operators are experiencing year-on-year growth in A2P messaging but many are unable to monetize this traffic due to security issues. The document reveals that less than 20% of mobile operators carry only authorized A2P messaging traffic, with most unable to monetize A2P SMS. The rise of unauthorized A2P SMS traffic presents new challenges for mobile operators to generate A2P revenue. Deploying an SMS firewall is identified as the first step for mobile operators to protect their networks from illegitimate traffic and start monetizing A2P messaging.