Signed up for iPhone Simplicity today and was given a microsim and told to go to swapmysim.o2.co.uk
Gone there, put in new number, and it's saying it's not recognised.
Any ideas?
I had to put my current numbe in then I got sent a code on the phone. Then I entered the serial number for the sim (printed on receipt but likely on sim). I was already on O2 though.