There's some interesting stats in this paper showing just how fast mobile data usage is growing following the roll-out of 4G. 

My analytical side automatically took control, leading me to examine some of my mobile clients' data trends. The first client that I looked at (a law firm with 80+ mobile connections), had a data usage growth of 55% from Jan 2014 to Jan 2015 followed by a 95% increase between Jan 2015 and Jan 2016. A second client (a financial management company),  had a 219% increased followed by an incredible 358% increase based on the same usage periods.

Luckily, our Refresh tariffs on O2, EE and Vodafone have never been more competitive. Higher data allowances at lower costs mean that our business clients will be able to keep up with market trends without worrying that their data bills will become uncontrollable.