What is service life of prepaid SIM card, and how to calculate when it will expire?
The service life means the duration you can use the wireless service of this SIM card, such as making calls, receiving SMS, setting up voicemails. The service life begins when you make the first call. The deadline is placed on the SIM card, usually about three months to six months. If you want to calculate the service life, please check the service life first, and then remember the first call date. We are sure you will figure out the correct end date.
