Meizu can't send text messages, why can she receive them?

You can accept text messages, but you can't send text messages, which means that your mobile phone text messages are fine.

You can try to change the card, or after backing up the data, set and store the cleared data and restore the factory settings to see if it is normal.

You can also contact the operator's customer service first and ask if the SMS function can be reactivated before testing.