I recently took out a contract with EE and with it I got a samsung galaxy S 4 and they gave me a nano sim, but I refuse to get locked phones from carriers what I do is just by it unlocked from apple then use my own sim even if my contract is another 1.6 years from ending so I would have to wait a long time for it lol
the problem with o2 is they dont offer any decent amount of data, but they are good and I cant wait to see what they offer on their LTE when it finally comes
The 1gb data will be sufficient for me as I have wifi at work and totally unlimited wifi at home so in theory I could downgrad the data bundle at a later date to save a few £££ but I dont think ill actually bother with the hassle.