Whilst the exclusive PlayStation Vita 3G provider is Vodafone, this does not mean you can’t use other services. If you buy the Wifi and 3G edition of the PlayStation Vita from Amazon, then it will come unlocked, allowing you to choose which network to use. The PlayStation Vita uses a normal sized sim, not a micro-sim.
You have the option of getting a 3G contract, or you can get a pay-as-you-go. If you are willing to commit to a contract, you will get a better data allowance package.
What is 3G? 3G allows you to access broadband speeds within most areas of the UK. 3G means 3rd Generation. You can generally connect at speeds between 1-6 MB per second, and upload at 1-2 MB per second. 3G can be faster than an average home broadband connection. It can be used anywhere in the UK.