The first time you use DAT One (Mobile), you will be asked to SIGN UP or LOG IN. If you are already a DAT subscriber, you will just choose to LOG IN with your existing email address and password. However, if you are not currently a subscriber, you will need to use the SIGN UP option.
Upon tapping the SIGN UP option, you will be directed to the registration page.
Note: When choosing email, make sure it is an email address that you have access to. DAT One (Mobile) will send a verification email to the email address specified at the time of registration in order to verify that you have access to the email.