Sorry to go OT but my head hurts now!
I'm trying to help a friend who needs a PAYG SIM for her network unlocked Android Smartphone and all we're trying to find is a SIM that doesn't eat her ten quid top-up, or part thereof, if she doesn't use it all. She has no number to port over so no need for a PAC code.
My friend is 96 years old and won't be using it for any other reason than making/receiving calls when necessary.
Can anyone recommend a SIM that doesn't have to be topped up every 30 days or so and will allow unused money to roll over?