Mobile network operators (MNOs) are evolving rapidly to deploy transformative networks—4G, 5G, SDN/NFV. Meanwhile they are battling a new and different cyber attack landscape that could compromise BOTH their networks AND their subscribers. Network and subscriber protection are no longer separate problems in this new digital age. Legacy security solutions are inadequate. A new approach to security is needed—with a focus on PREVENTION —not just a reaction to prior known threats. Adopting a prevention posture enables operators to get ahead of the evolving sophistication of attackers.