As I stated in another thread I was looking at downgrading my iPhone to something simple. Anyway, I went ahead and did this and now find I have a rather weird set-up going on. As the SIM card for the old phone is a regular sized one (compared to iPhone's micro sim) I had to contact my provider and get them to send out the correct one. I was given a number to ring for activation and late in the evening of last night I got my new, old phone up and running. I activated the sim and all seems to be working as it should. However, I can still use my iPhone for anything that uses WiFi - this includes internet, Whatsapp messages (a group messaging application), Normal text messages (to other iPhones). In short I can still do anything with my iPhone that doesn't require the services of my carrier. I just tried sending an SMS to a non-iPhone, with my iPhone, and it failed, but I can send normal SMS to iPhones (as they use WiFi to do this) Does anyone know if this will be the case indefinitely or will my iPhone eventually lock up?