4G will only be accessible to those with phones like iPhone 5 and Samsung Galaxy SIII LTE.
Until today Britain has used 2G and 3G networks to connect phones and tablets to the internet on the go. 4G allows users to download more quickly with promised speeds 5-7 times faster than today's 3G by 2014.
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Overall GCSE pass rates have fallen this year amid the biggest shake-up of exams in a generation.
The reforms are the biggest shake-up of the exam system for a generation. Here's what's changed.
It is the first year traditional grades have been replaced by numbers, will all subjects being scored like that by 2020.