If you don't use your mobile phone number for a long time and want to keep it, it's recommended to apply for a shutdown number: 5 yuan/month for the whole month, and click /yYJBfi to handle it directly. As long as the phone bill balance is sufficient during the outage insurance period, there is no outage limit, but if you don't pay for a long time, the number may be sold. During the downtime, all functions on the mobile phone, SMS, Internet access and other cards can't be used, but the phone bill can be recharged normally ~