Anonymous homing pigeon shows that the SMS has been sent but not received. What happened?

Anonymous homing pigeons show that messages have been sent but not received for the following reasons:

1. Network problem: It may be that the network sending the short message is out of order or the signal is unstable, which makes the short message unable to be sent successfully. In this case, you can try to resend the SMS or wait until the network is back to normal.

2. The receiver's mobile phone problem: Sometimes, the receiver's mobile phone may have some problems, such as poor signal and insufficient storage space, which makes it impossible to receive short messages. If this is the case, it is recommended to contact the receiver to confirm whether the mobile phone works normally and ensure that there is enough storage space to receive the short message.

3. Shielding settings: Some mobile phones or SMS applications have shielding settings, which can block messages of certain numbers or keywords. If the receiver sets your number or keyword to block, even if you send a text message, the receiver can't receive it. In this case, it is recommended to communicate with the receiver to ensure that your number or content is not misjudged as spam.

4. Operator's problem: Sometimes, the operator may have delay or other problems, resulting in the short message not being sent in time. In this case, it is recommended to wait a little. If you haven't received SMS for a long time, you can contact your own operator to understand the situation, or try other ways to communicate.

In short, the anonymous homing pigeon shows that the short message has been sent but not received, which may be due to network problems, receiver's mobile phone problems, shielding settings or operator problems. In this case, you can try to resend, contact the receiver, check the blocking settings or communicate with the operator to find a suitable solution.