Coming up to a year since Vodafone switched on its 4G network, the carrier's finally opened those superfast airwaves up to pay-as-you-go customers today. If you already own a compatible handset, all you need is a £20 "Freedom Freebee" top-up -- which grants you 2GB of data, 500 minutes and unlimited texts -- to start enjoying LTE speeds (anything cheaper and you're stuck on 3G). Higher top-ups of £30 and £40 get you 4GB and 6GB respectively, as well as unlimited calls and either Spotify Premium or Sky Sports streaming access. You're probably best springing for the £20 option initially, though, as your welcome bonus to 4G PAYG is unlimited data for the first month. If data is all you're after, PAYG mobile broadband customers can now also access 4G at a minimum cost of £15 for 2GB.