O2

I already have a PAYG SIM (not O2) and I have a handset and i have a PAC code. How, on earth do I switch it over to the O2 network as everything I do i am going round in circles

I used to use a Doro Easy Phone 508 and recently bought a new handset - a Doro 7080. I thought it would be a straight easy swap, but it hasn't been the case as my old SIM was a standard one, thus too large for the new handset. I had recently ordered ...