Every 500MB of UK data will allow you to (approx):

Send 500,000 emails, without attachments

or send 1,000 emails, with photos attached

or visit 5,000 simple sites, like Twitter or your favourite blog

or visit 1,500 rich content sites, like bbc.co.uk, guardian.co.uk or yahoo.co.uk

or download 50 (low quality) or 12 (high quality) music tracks

or watch 60 YouTube videos, about 4.5 minutes long

If you're using lots of data and getting close to your network data limit, we'll let you know with a text message. And if you find that you're using a lot more 3G data, you can choose to add an optional Data Bolt On.

Don't forget, all our tariffs come with unlimited Wi-Fi through The Cloud and BT Openzone at thousands of hotspots in the UK. And when you use Wi-Fi, it doesn't count towards your 3G data allowance. Use as much as you like, no extra charge.