EE Tariffs

Hey guys,

I will be buying the Nokia Lumia 920 sim-only, and then likely opting for one of EE's new sim-only tariffs.

They don't say (from what I can see) how long the sim-only deals are for. I.e. I'm on a sim-only simplicity deal with O2 right now which is a 1-month deal so i can opt out basically whenever i want. Will this be the case with EE?