In Alerts, go to the Delivery Methods tab and scroll down to Mobile Devices. Select the Add New button on the right of the page. If your cellular service is with a major provider, fill out the information on the top half of the page. For Service Provider, select your cellular provider and click Continue. If your cellular service is not listed, please select the second radio button and fill out the information on the bottom half of the page.
For email address, insert the appropriate email address (with your cell phone number) for your cellular provider (i.e. email@example.com for AT&T cellular service). Click Continue. On the Delivery Method tab you'll see your mobile device listed as an option.
When setting up alerts, select any of your saved methods as a delivery preference - up to two email addresses and, as text messages, to two mobile phone numbers at a time.