GMS and Cellusys partner to offer complete A2P revenue assurance and a suite of cutting-edge security solutions The two will offer operators best in class messaging services through the most advanced firewall and analytics platforms to maximise messaging revenues. Cellusys is one of the market leaders in security, anti-fraud, and roaming solutions. Their versatile solutions are helping us deliver best in class services to GMS customers.” — Salman NayyarBAAR, SWITZERLAND, April 28, 2021 /EINPresswire.com/ -- Global Message Services (GMS), an international messaging service provider and a ...