Disable "Repeat Alerts" for messages on your iPhone

Are you tired of a message tones repeating itself twice or more. Your iPhone will repeat all alerts at two minutes intervals. Use the guide below to use single tones message alert.
How to Disable Repeat Alerts on your device
This configuration will apply to all incoming text messages (SMS), Whatsapp, email,iMessages and more.
Click Settings –> Open “Notification Center”
Scroll down and choose “Messages” –> Next step find and press “Repeat Alerts”
Choose “Never” from this list and press back to save changes.
Now you have successfully changes how many times you want your iphone to repeat alerts.