OK, sorry for the vague response. I guess I really thought I was talking to myself!
On your phone, go to the market app. When it opens you will see three tabs near the top: Apps, Games and Verizon. Select Verizon. When the list populates, find "My Verizon" and install it. Once it is installed, open the app and once you have logged on (using the same logon and password you would use on the website) you will arrive at the home screen which contains four large buttons: bills, plan, device, and profile.
The "device" button has many choices, on my phone, Family Locator is at the bottom. It requires you to logon again, using the same logon as before. It's not great but it works and once you have logged on the My Verizon once you shouldn't have to any more. Let me know if I can be of any help.