This dramatic shift in consumer behaviour has seen the average amount of data used by contract customers each month soar to 1.1 gigabytes (GB).

ENGADGET: Shocker! Three's unlimited data adopters use lots of 3G

The average amount of data used on a smartphone tripled from 2010 to 2011, according to Cisco's Global Mobile Data Traffic Forecast Update.

CNN: Your smartphone is a pain in the neck

To determine the average amount consumers might pay to keep their new cars in operating condition, we used 2008 repair estimates calculated over a five-year period by Vincentric, an auto-industry data-analysis company.

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