It means that the validity period of the phone fee is 90 after 90 money inside the money is frozen, you need to recharge in order to use and then extend 90 days, if you play less, it is best to choose a small face value of the recharge card This business is mainly for the intelligent network. The amount of mobile phone charge extension time is as follows: 30 yuan three months 50 yuan six months 100 yuan a year for example: just opened a number with 100 yuan valid for one year do not continue to recharge it will expire if you recharge 30 yuan you can delay the period of 90 days expired - is a year after 90 days this card will expire.