Explore the secret phone settings
Not all of the call settings are in ‘Settings > Phone’ – some come under the different subject heading of Accessibility. The options here include where to send the output from the caller and the choices available are Automatic, Bluetooth Headset and Speaker. Add the option to auto-answer incoming calls and you can control when to answer and how to receive the call. There are more Accessibility settings, such as vibration and phone noise cancellation.
1 AUTO-ANSWER CALLS
If your hands are dirty and you don’t want to touch your iPhone, go to ‘Settings > General > Call Audio Routing > AutoAnswer Calls’ and turn it on.
2 ALWAYS USE SPEAKER
Another tip is to always answer calls on the speaker. Go to ‘Settings > General > Call Audio Routing’ and select Speaker and you can autoanswer calls on speaker.