| 摘要 |
A method of billing usage of hired telephones and apparatus therefor. A hirer is supplied with a plurality of telephones and SIM cards, SIM card reader/writer, host processor and software for the reading, writing and programming of SIM cards. A user hiring a telephone is supplied a telephone with a programmed SIM card. The SIM card records billing information for calls made using the telephone which are later charged to the user. The SIM card may alternatively store a credit amount from which call charges are deducted. On the SIM card the hirer may create and alter credit limits, store customer information, set tariffs for calls and information used to block disallowed calls.
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