On Mon, 7 Nov 2016 18:08:54 +0000
John Rumm wrote:

Two; the phone you get from some supermarkets (like tesco) will
likely be locked to their network. So make sure you buy from a place
the does unlocked phones (carphone whorehouse normally do, as do
plenty of online sellers)

Tesco also sells unlocked 'phones.
..
--
Davey.