From a Home screen, navigate: Settings > Accounts.
Tap Add account.
Tap Create account.
Enter the appropriate name into the First and Last name fields then tap Next (located in the lower-right):
Enter a birthdate and gender then tap Next.
Enter the desired username into the Email field then tap Next.
Enter a password into the following fields then tap Next:
The password must be at least 8 characters.
From the "Add phone number" screen, ensure the correct Phone number is listed, tap Next then tap Verify.
A verification message is sent to the device.
If you don't wish to include a recovery phone number, tap Skip.