How to check the SMS balance of mobile phone card

If you want to query the phone bill balance by SMS, you can edit the SMS "CXYE" or "YE" to 100 10 to query the current available balance fee; If you need to use SMS to query traffic, you can edit the message CXLL (case-insensitive) or 107 1 to 100 10 to query the traffic usage of this month as of the previous day.