snowmen wrote:
Thanks for the reply and useful information!
Good to know any monthly sim will do and you can do it through uswitch which offer better deals than the standalone O2 website.
I changed several times (my Tariff) whilst in contract using USWITCH.com every time. It just restarts a new 12 month contract and nulls the old if you login during the checkout process (as O2 checkout by that stage). O2 a few months ago added a warning about early termination charges, but it gets zeroed out in the checkout confirmation page (as they advertise you can change your tariff at any time so to action the warning could be trouble for them). With uswitch.com, you'll get the option to login to your O2 account, and to select that you don't want a new SIM sent.