Hi, hopefully an easy question to answer. I've upgraded my Samsung phone and wanted to know if I need to be using the new SIM card which has come with it. For reference, I'm an existing EE customer so no network switching, more about number porting, contacts etc. and other info which might be stored on the Sim. For example, I'm assuming that plan data and data allowances are held independent of the Sim anyway.
If someone could confirm I'd be OK to keep my old Sim that'd be great given the considerations raised above!
Many thanks in advance,
Tim
