4G is up to 5 times faster than 3G, making it much easier to watch videos, play games, tweet and browse on your phone. Downloading a 10-minute video clip, which takes minutes over 3G, takes seconds on 4G.
Our 4G network will take over the frequency used by analogue terrestrial TV. This signal passes through walls more easily, so we'll be able to give you great indoor coverage.
However, 4G speeds will still vary depending on location and the number of people using the service. Check out the Ofcom website for more info.
You'll need a few things before you can get started with 4G:
You don't have to recycle your old phone when you upgrade to 4G, but O2 Recycle could help cover the cost of your upgrade.
If you're not sure about any techy terms, check out our jargon buster
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