Z7max, ZTE Daniel, can't send text messages.

1, whether the mobile phone is in arrears due to downtime and whether the surrounding signal is good and stable, please keep the communication normal. 2, open the SMS Settings-SMS center number settings set the correct number to try (SMS center number please consult the operator). 3. Whether the third-party communication software (such as mobile phone housekeeper, LBE, etc.) is installed. , prohibit SMS self-initiation)? It is recommended to uninstall and try to restore the factory settings of Shuangqing mobile phone. 4. Compare and test the replacement of other SIM cards. If it is a card problem, it is recommended to contact the business hall for replacement.