Can I use my phone as a protractor?
I assume that you are talking about the Protractor framework that is primarily used for web automation testing. For starters, Protractor is a NodeJS-based test automation framework that is primarily used for testing Angular and non-Angular applications.
There are a number of Selenium Protractor tutorials that can help you get started with Protractor for web automation testing. However, you would not be able to use the Protractor framework on mobile devices.
You can check out Appium or other mobile automation frameworks to perform mobile app automation testing.