Build website that sends true user info before user is calling or texting

1 - Users go to [login to view URL] Then they make a user with a phone number and full name. No password. 2 hours to implement. 2 - We then get users' full name and phone number and store it in a Firebase database. 2 hours to implement. 3 - Users can click on their recent incoming and outcoming contacts or dial a new number and a search is made in the Firebase database. If the other user exists in our service it will show with full name. 1 hour to implement. 4 - When a user clicks the call or sms button for a given name or number a Firebase push notification message is sent to the other user website (if they are logged in) with “Tomas Adrian” is calling soon or “Tomas Adrian​” is texting soon. If the name or number is not a user a message will not be sent. 2 hours to implement. 5 - Incoming and outcoming calling names and numbers are saved for easy use later. 1 hour to implement. 6 - When a call or sms button is pushed the normal calling or texting application on the phone is opened with the caller name or number ready to make the call or to write the message. Just like a weblink. If you push a number on the web the phone opens the dialer. 1 hour. Need to make a simple design with a maximum of 3 colors. In total about 10 hours.