1) If I buy a PAYG O2 phone, even if I have to buy airtime initially to get it (which therefore comes with a new number) can I just bung in my current PAYG SIM and use it on the new phone? I really don't know about these things...
2) Do you ever get them SIM free?
3) Where are the best / cheapest places to buy O2 PAYG phones that isn't eBay?
Tank yall en advance.