Launch the One Talk app.
Splash screen displays for a short while.
If presented, tap Allow to accept app permissions.
Enter the One Talk number and the preferred name then tap Request PIN to be sent by email.
Ensure the user assigned to the line has a valid email address in My Business.
If an email isn't received the user should engage their IT team to whitelist this email domain: email@example.com
Enter the PIN sent via email then tap Activate PIN.
From 'Setup your Device & Profile' screen enter the appropriate info then tap Next:
Profile info must be completed along with 911 address in the mobile app to complete the process.