Callum said
"Seems to me that PAYG validity is an important issue, so I am going to copy & paste and write to all the network providers, I will publish my findings here"Just to let all know that Vodafone, at least, are still terminating unused PAYG numbers. We have bought a 'big button' mobile for my elderly Mother-in-Law with our contacts pre-programmed in so, in an emergency, all she has to do is press 1,2 or 3 to get to us.
Unfortunately, I'm not sure just how long it sat unused but, when she did come to try it recently, it was just dead. After contacting Vodafone, we were informed of their policy of terminating unused PAYG SIMs.
I don't like it but I suppose you should always read the small print. Worse still though was the fact that we had initially purchased £20 of credit, very little of which was used, and this disappeared into the ether when the SIM was terminated! No amount of discussion would persuade them to reinstate it!!
Lesson learned, M-i-L now makes a brief call every month or so to avoid this problem happening again.
I'd be interested to hear of any PAYG providers who do NOT terminate through non-usage (and confiscate your money

)!!