Tariff
The set of prices that you pay for using your phone. This will normally include a monthly fee, an amount of free calls and a rate for calls per minute, which may vary by time of day. There is usually a range of tariffs to suit each style of user; such as one for customers who use their phone mainly during off-peak hours, one for very heavy users, and other for those who only use their phones occasionally. By choosing a tariff which suits the way you will use your mobile phone, you can be sure to get the lowest possible call charges.
