You can easily manage your BT Mobile account online by logging in to My BT with your BT ID and password.
You'll be able to see everything you've used since your last bill and a summary of your details.
Another way of keeping an eye on things is by using the My BT app >
Or check out our video - it's best to watch in full screen mode. You can do this by selecting the icon in the bottom right corner when you play the video.