If you've got a large family that includes teenagers, the chances are you have a fairly large monthly landline telephone bill too. That's because, even though most adults and children in the 21st century have their own mobile phones, using a landline is an easy option if you're out of credit, have a dead cell phone battery or you know someone else will foot the bill.
However, while it can be hard to monitor telephone use if there are multiple people in your home, it is still possible to lower your landline bills if you enforce a few simple rules upon your family.