Joke Collection Website - Public benefit messages - Why can't I send a message to Telecom?

Why can't I send a message to Telecom?

In case 1, the number of the short message center is set incorrectly. Please reset the correct number of the SMS center.

In case 2, if there is no signal or the signal is poor, you can go to a place with strong signal to test.

In case 3, the short message sending function is turned off, so you can turn on the short message function and try again.

Case 4 is blacklisted by SMS and can only be used normally after going to the business hall to remove the blacklist.