I have a couple of mobile phones that are only used to receive calls, and then sometimes only once or twice a month. I've been using PAYG SIM's on EE and Vodafone and putting £10 credit on them at the start. However both companies keep killing the number after a couple of months :-( . Ideally I'd like to keep one on EE and the other on Vodafone and have no need of texts or data on them. Does anyone know what my best options are ?