Without a doubt, you must be extremely satisfied with your iPhone 6. It is a great device, and it works really well. However, it would be wrong to expect that everything will work like a charm all the time. Sometimes, you will run into some bugs, and one of them is no sound when you are talking to someone over your favorite device. You can barely hear, or not hear at all the other person. We prepared 5 ways to fix no sound during calls on iPhone 6, so make sure to check them out. Let’s get started.
See also: 5 Ways To Fix IPhone 6 Doesn’t Ring
5 ways to fix no sound during calls on iPhone 6

Source: imagefriend.com
Solution No.1: Turn the volume up.
Maybe you accidentally turn the volume down at some point, not even noticing. During a call, press the volume buttons on the side of your iPhone 6, and turn it up. Maybe that is everything you need.
Solution No.2: Clean the receiver.
You will need a toothpick for this. Clean the receiver gently, and make sure to remove all dirt and dust from it.
Solution No.3: Turn off Bluetooth.
Check if the Bluetooth is turned on. If that is the case, turn it off. To do that, simply navigate to Settings, tap on Bluetooth, and turn it off.
Solution No.4: Restart your device.
In many cases, restarting your phone provides excellent results, and successfully fix many problems. Press and hold the sleep/wake button, and when you notice the slider, just drag it to restart your device. It will turn off, so you will have to press the same button, to turn it back on.
Solution No.5: Latest version of iOS.
Is the new iOS version available? If the answer is yes, make sure to get it in order to upgrade your device. Connect your iPhone 6 to a power source, and to the Wi-Fi network. Go to Settings > General > Software Update.
Now that you have tried all 5 ways to fix no sound during calls on iPhone 6, we hope that you are satisfied, and that everything works as it should.