Add an OAuth Client in Frappe Server.

Add Account on Android

Go to Settings > Accounts and click on Add Account

Select Frappe to Frappe Server account.

Enter the Frappe server, Client ID and Redirect URI here.

Click Sign In, Enter your account the credentials and login.

Added account is seen under Settings > Accounts > Frappe

Allow Contact Permissions

In Newer version of Android go to Settings > Apps

Select Permissions and enable Contacts permission

##### Under All app, search Frappe Authenticator

Set Contacts to Display in Contacts Manager

Go to the Phone's Contacts app,

Click the menu and select Contacts to display

Select the Frappe account contacts to display under contact list.

Click on the Frappe icon on phone book contact to view ERPNext Contact

For Developer

Develop integrations with Android apps using Frappe Authenticator