If you use a fair bit of social media, Voxi is not a bad shout - its Vodafone network - and they seem to bump up the data allowance at random points (So they do

If you use a fair bit of social media, Voxi is not a bad shout - its Vodafone network - and they seem to bump up the data allowance at random points (So they double it for the same price kinda thing) as well as the unlimited social use (on certain sites)