Meizu mobile phone can't send text messages. What's going on here?

Solution: 1 Check whether the mobile phone is in arrears. 2. Open the SMS settings and check whether the service center number is normal. 3, check whether the local signal is normal, you can use other mobile phones to try to send text messages. 4. Open the mobile phone security center, click to clear the mobile phone cache, and then shut down and restart. 5. Turn off the phone, then press and hold the power button and the volume up button at the same time, shake and let go, and then choose to clear all data. 6. Go to Meizu official website to download the latest firmware, brush the firmware again, and select Double Clear. 7. It is recommended to go to the local Meizu authorized service experience center and ask the engineer to test it.