> ## Documentation Index > Fetch the complete documentation index at: https://docs.ulm.m1amdocs.com/llms.txt > Use this file to discover all available pages before exploring further. # Onboard and Authenticate with Mobile Number Digital Identity Management provides user onboarding and authentication with mobile number and password. An end user navigates to a merchant's portal to sign themselves up as a new user by providing registration details such as mobile number, password, and other basic information. Once they are registered, they can log in to the portal to start using the services they signed up for. ## Mobile and Password User Onboarding Flow Following is a typical user onboarding example for this flow: * New user visits the organization's login page. * New user signs up or registers to Digital Identity Management services with their mobile number, password, and other basic information. * Digital Identity Management sends a verification message with a verification link or One-Time Password (OTP) to the user's mobile number. An OTP is a password that is valid for only one login session. * User verifies their mobile number and identity using the verification message sent by Digital Identity Management. * User is activated into Digital Identity Management. \[product: dim]Mobile and Password User Onboarding Flow\[/product: dim] ## Mobile and Password User Authentication Flow Following is a typical user authentication example for this flow: * A user visits the organization's login page. * The user logs in with their mobile number and password credentials. * Digital Identity Management verifies the user identity. * The user is logged in to the merchant's portal after Digital Identity Management's successful identity verification. \[product: dim]Mobile and Password User Authentication Flow\[/product: dim] * **[Onboard user with mobile number](../topics/c_useCaseOnboardMobile)** **Parent topic:**[Onboard User with Email and Mobile Process](../topics/c_onboardUserEmailMobile) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.