Hi, I'm looking at changing from my truely terrible Samsung E720 to an alternative phone. The two that have caught my eye are the Nokia N70 and the SE K750i. I've been offered both 2nd hand for reasonable prices however they both are on the Orange network, my existing deal is with O2. I was leaning towards the K750i and after looking through these forums I learn that the N70 can only be unlocked by Orange, so definatly rules that one out. My question is, is it possible and whats the best way to go about unlocking an Orange k750i so that i can use it with my O2 sim card?? I heard there could be potential problems with Orange using them stupid "orange buttons" on there phone screens?? Would unlocking wipe these out and start afresh when my O2 sim was inserted?? Thanks!