I recieved this notice via text so I can definitely tell you it affects customers on pay monthly contracts and on the unlimited internet flexiable booster as this is what, I am on and quiite franlky this is a p*** take, It is not unlimited just because they don't expect users to exceed the current 2GB fair usage policy in a month but I can tell you right now they do including myself and this change will become in effect on the 2nd of February for UK customers and dropping this to 500MB just takes the mick. If anyone is thinking of joining T-Mobile don't! There service is degrading faster then I breath.