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Why can't I send a message when I set the SMS center number?

1. Hello, the number of Zhengzhou Unicom SMS Center is+8613010761500. If you can't send SMS after setting the SMS center number, you can only receive SMS. It is recommended to check whether the following conditions exist:

(1) The SMS sending function has been blocked on the mobile phone;

(2) blacklisted by SMS;

(3) Insufficient quantity balance.

2. If the problem cannot be solved after self-help troubleshooting, it is recommended that you contact local manual customer service to assist in verification and handling.