There could be several reasons why you are experiencing no sound on Netflix on your iPhone. Here are some steps you can take to troubleshoot the issue:
1. Check if your iPhone is on silent mode: It's common to forget to turn off the silent mode on your iPhone. Swipe up from the bottom of your screen and check if the bell icon is crossed out. If it is, tap it to turn sound back on.
2. Check if the volume on your iPhone is turned up: Press the volume up button on the side of your iPhone to see if the sound comes back on. Make sure the volume is turned up and not set to a low level or muted.
3. Make sure your iPhone is not connected to a Bluetooth device: If your iPhone is connected to a Bluetooth device, the sound may be playing through the disconnected device. Check your Bluetooth settings and disconnect any devices that may be interfering with the audio.
4. Check if the Netflix app is updated: Make sure the Netflix app is up to date. If you're using an outdated version of the app, it may not be compatible with the latest version of iOS and could cause sound issues.
5. Force close the Netflix app: Swipe up from the bottom of your screen and swipe left or right to find the Netflix app. Swipe the app up to force close it. Wait a few seconds and then open the app again.
If none of the above steps work, try resetting your iPhone by holding down the power button and the volume down button simultaneously until the Apple logo appears. If the issue persists, contact Netflix support for further assistance.