I've had a PAYG phone rather than contract for the last few years as I don't use it much. DD1 is getting to an age where she's more independent and we were looking at getting her a mobile, but she's not impressed with the cheap non-smartphones I was looking at and is much more keen for me to pass on my (budget) smartphone instead. I'm ok with this, but keen to keep my number so thought I would buy a sim free phone and swap my SIM card into it, rather than be tied to a particular network for a year, but is it as easy as that? And if so, where is the best place to look for sim free handsets (other than Amazon, which I'm trying to avoid)?