A few of our clients want to be able to use a smartphone to call for assistance if needed during the night. Voice dialling is available on both iPhone (from iPhone 6S onwards) and Android phones, so that is not an issue. Auto answer is also available on iOS 11 and through various Android apps. That is also not a problem. The problem comes if you try to call someone who doesn't answer and you get stuck in their voicemail – there is no way to end a call by voice. Our research t