Steps on How to Register Your Zagg Product Step 1. First, you will want to visit the URL www.zagg.com using your favorite web browser on your smartphone, tablet or laptop computer. Wait for the website to completely load before going to the next step. Step 2. Do you already have an account on Zagg? If not, you’ll be prompted to sign up. To log in, you just need to enter your email address and password, but if you’re a first time user then you may enter your email address on the right side of the page and click the gray ‘Continue’ button.