The message could not be sent. What is the reason for the failure of message sending?

(1) First, make sure that your mobile phone is off. If it stops, charge the phone bill quickly. If not, confirm whether your SMS center number is abnormal.

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(2) If it's not the phone bill and settings, it's the phone itself. You should have installed housekeeper and other software, such as mobile phone housekeeper. When optimizing the mobile phone, the functions of the software that comes with the mobile phone, such as SMS, may be disabled.

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(3) Solution: (Take the mobile phone housekeeper as an example) Turn on the mobile phone housekeeper → Clean up and accelerate → Self-start management → Turn on the SMS function (allowed). Just restart.

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(4) If all the above are useless, you need to reset your mobile phone.

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