If you don’t see this button on iPhone or Android, you aren’t actively in a phone call and have the phone app open. If you’re using a landline, like a Cisco phone, push the button on the phone that has a speaker icon. This will enable speakerphone and you can hang up the receiver. To turn the speakerphone off, simply pick up the receiver and press the speaker button again. [2] X Research source If you find that your iPhone always answers on speakerphone, you may want to use the following method to turn off the default speakerphone option.
For iOS 12 or earlier, these steps will be slightly different. Go to Settings > General > Accessibility > Call Audio Routing > Automatic instead. [3] X Research source
