Lifesize Phone HD Quick Start Guide With Lifesize® Phone™ HD, you can manage audio, web and video conferencing, as well as share your screen, making it easier than ever to collaborate with colleagues and partners. The vivid and responsive touchscreen interface provides rapid access to the most popular features. Let’s get started! For Lifesize customers with Lifesize Phone HD attached to a Lifesize® Icon™ (excluding Lifesize Icon Flex) paired to the Lifesize service, you can customize your Lifesize Phone HD home screen with the buttons and time zones that work best for you. Learn how.