In this article, let us explain how to disable getting two time messages alerts in iPhone.
iOS is set to repeat alerts once for the Messages app, If you read the message after the first ding, it doesn’t ding again. The reason for this is that Apple sets notifications and alerts to repeat once by default on iOS devices. Meaning you’ll get a second alert for the same message two minutes after the first one. But you can turn off repeat alerts or double text notifications on your iPhone using the following instructions:
How to turn off double message alerts on iPhone
Open Settings and tap Notifications.
Then, scroll down and select Messages.
Tap Customize Notifications.
Again scroll down and tap on the “Repeat Alerts” option. By default this option is set as “Once” in iOS.
Finally, choose Never to disable double notifications.