a (mobile phone) contract - a written agreement between a mobile phone company and a customer
pay-as-you-go - a system where you pay money in advance to your mobile phone company, which is then used to pay for each call you make
run out of credit - use all money you have on your pay-as-you-go mobile phone so that you can't make any more calls
a (mobile phone) network - a system of phone lines or electronic signals that are connected together
get cut off - when you lose the connection with the other person during a phone conversation
reception - the quality of phone signals that you receive
a ringtone - the song or short piece of music that your mobile phone makes or plays when somebody calls you
voicemail - an electronic telephone answering system used by companies and mobile phone users
an answerphone - a machine in your home that recorda phone messages
a payphone - a public telephone
a landline - a phone line that you have in your home
a smart phone - a more advanced mobile phone which works like a mini-computer
a touch screen phone - a phone with a screen you touch to tell the phone's computer what you want to do
predictive text - when words are suggested automatically by your mobile phone while you are writting a text message on it
a feature - a typical quality or important part of something