O2.co.uk/MobileBroadband
For all the best offers on O2 Mobile Broadband make sure you visit O2.co.uk/mobilebroadband. Currently you can get a Free 3GB USB modem for just £10 a month for the first 4 months of a 24 month contract.
Or if you prefer you can get a Pay As You Go USB modem for £29.35 then get online for £2 per day.