One of the most important factors to be taken into consideration when choosing a Mobile Broadband contract is the monthly download limit. It can be difficult to estimate what your average monthly usage will be but it is important to get the right allowance. Those who use the internet to check emails and make occasional purchases are likely to be 'light' users. Those who download music, stream videos and use the internet daily will need a higher limit to avoid incurring costs.
Going over your download limit can result in surprising large charges which are more like fines than payment for extra usage. In fact O2 has been criticized for charging a whopping £200.70 per extra GB. To put it in context that would get you about 12 months of Mobile Broadband with most providers. The cost of providing extra bandwidth does not justify this fee which O2 have referred to as 'a deterrent'.
A recent survey has shown that around 25% of Mobile Broadband users don't know what their download limit is. This puts them at risk of incurring a charge for every extra MB used. Most providers inform their pay as you go or fixed contract users when they are nearing their limit although this shouldn't be relied upon. Those looking to sign up for Mobile broadband can estimate their monthly downloads using Three's Data Usage Calculator.