Bear in mind that as with anything 'unlimited', there are of course restrictions.
I believe that Tmobile's Fair Use Policy stipulates 1Gb of data (3Gb for Android phones).
http://www.t-mobile.co.uk/services/uk/fairuse/?WT.mc_id=fup#fup2
I believe that Tmobile's Fair Use Policy stipulates 1Gb of data (3Gb for Android phones).
Pay monthly plans which include internet on your phone
If you choose a Pay Monthly plan which includes internet on your phone, you’ll need internet coverage, check it at t-mobile.co.uk/streetcheck. Remember that you can only use internet on your phone in the UK and you can’t use your phone as a modem or use internet on your phone for peer to peer file sharing, instant messaging or making internet phone calls. *Internet on your phone comes with a fair use policy of 1GB a month. We’ll monitor how much you send and receive each calendar month so that we can protect our network for all our customers. If you use more than your fair use policy amount, we won’t charge you any more, but we may restrict how you can use your booster, depending on how often you go over your amount and by how much. If you remove your booster and then use internet on your phone you’ll automatically be charged our daily rate, see t-mobile.co.uk.
Pay monthly plans which include internet on your phone on an Android phone
You'll get internet on your phone Plus included if you join us on a pay monthly plan with an Android phone in a T-Mobile store, over the phone or via our website, t-mobile.co.uk. You'll need internet coverage, check it at t-mobile.co.uk/streetcheck. Remember that you can only use your internet on your phone Plus Booster in the UK and you can't use your phone as a modem or use Internet on your phone Plus for peer to peer file sharing, or making internet phone calls. *Internet on your phone Plus comes with a fair use policy of 3GB a month. We'll monitor how much you send and receive each calendar month so that we can protect our network for all our internet on your customers. If you use more than your fair use policy amount, we won't charge you any more, but we may restrict how you can use your plan, depending on how often you go over your amount and by how much. As your phone is always connected to the internet, if you remove your internet on your phone Plus Booster from your account you'll automatically be charged up to £1 every day. That £1 a day rate has its own fair use policy and other legal stuff, which you can see here: t-mobile.co.uk/services/uk/fairuse/#fup5.
http://www.t-mobile.co.uk/services/uk/fairuse/?WT.mc_id=fup#fup2