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The e-criminals are using invasive surveillance technology, fake cell towers known as IMSI Catchers, to intercept mobile phone traffic and track the movement of mobile phone users. IMSI catchers cause devices located nearby to automatically lock on, subjecting the phones in its vicinity to a man-in-the-middle attack. The latest and most powerful models can intercept and listen to phone calls, collect and read text messages and emails, with early studies revealing evidence of widespread, but largely unreported usage, across the UK.

Odd Helge Rosberg, chief technical officer at Rosberg System, a Norwegian headquartered firm aiming to produce software capable of stopping attacks from Silent SMS and IMSI catcher technologies, commented: ""Businesses need to be aware that until they address the issue of smartphone security, they're effectively leaving the doors and windows to their network wide open for cyber criminals to access."