I am viewing my home page in sf1 app. There I can see a global action Called New Contact. What I want to understand is is there any way to remove it from Home page? I want to add a custom quick action instead
You can change the Global Publisher Layout To remove "New Contact" action from the Home Page by following these steps:
For more information: Refer to Create Global Quick Actions in Salesforce Mobile App Customizations
It will aslo help you in creating and adding custom quick actions in mobile app. You will get idea about how to create and remove actions from mobile app and from where to do this.