Facebook videos have no sound on iPhone or iPad How to Fix
More often that not when your watching videos on Facebook the sound seems to not play at times. Thankfully there are easy fixes for these no sound and speaker problems.
The first step and generally the most overlooked one is to ensure that the silent/ loud toggle button on the side of the device is switched to the loud mode. If the toggle is showing and orange colour then it is on silent so just flick that the other way. Once it is switched on to loud mode you then want to turn up the volume from the side buttons or from the side up menu.
Sometimes there will be a glitch in the Facebook app so you will have to exit the app. Double tap on the home button which will show the apps running in the background. Once you come across the Facebook app slide it up or hold and press the red x if running later that iOS8.
Similar to the above step this may eliminate any glitch that is causing the sound and speaker problems. This fix seems to be very successful. So you want to restart the iPhone/ iPad by holding the home and lock screen buttons together for 10 seconds and more. The device will turn off and restart within 30 seconds. This will NOT remove any data, phots etc.
Another good step is to delete the Facebook App and reinstall, before you reinstall the app check for updates in the app store and also if there is a new iOS.
If any of these fixes or solutions have worked for you please share your experience as it all helps, Thanks!