To sign up for H2O Wireless, purchase a plan through H2OWirelessNow.com. The company offers customers the options of monthly unlimited and pay-as-you-go plans, as of 2015.
To purchase a plan, visit H2OWirelessNow.com, and place the cursor over Plan. On the drop-down menu that appears, click either Monthly Unlimited or Pay As You Go.
On the Plan page, click one of the plans. On the next page, select the plan options, including the quantity and the SIM card. You also have the option of adding a phone on this page. Once you finish, click Add To Cart.
The site then takes you to your cart. Click Proceed to Checkout. You must have an account to place an order with H2O Wireless. If you already have an account, log in using your email address and password. Otherwise, click Register Now, and create an account.
Once you log into your account, enter billing and shipping information. On the order summary page, submit your order. When you receive your order, activate your number through the website.
Alternatively, visit a store that carries H2O Wireless, and sign up in person. To find a store using the website, visit the homepage, and click Store Locator. Enter a ZIP code to perform a search, or click on a state and then enter a city.