Hi Jaark, thanks for your reply.

I had found this information on their "fair" usage policy: http://www.t-mobile.co.uk/services/uk/fairuse/

But it seems that all three of the mobile internet packes outlined there (Flext,
Combi & U-Fix) "do not permit use of this service to provide modem access for a computer or for peer to peer file sharing, internet phone calls or instant messaging."

Is this what you where referring to or was it something else? I remember hearing that they have higher max GB/month plans, is that what you were talking about?