We look at your calls and texts over the previous six months, and base your Best Plan recommendation on your average usage. If your usage has been a bit up and down, our recommendation may not be the most suitable plan, so you might decide you want to stay with what you have. And if you're on the best plan for you already, we'll tell you.

It's worth remembering that if you do move to a lower priced plan, it could affect which handset we can offer you when you upgrade.