How do I sign up for unlimited data usage on my verizon phone?

I have an LG Dare and I want to get the unlimited data usage for $15 a month, but I already have a plan, and I can't figure out how to add the data usage to it. I'm assuming that unlimited data usage covers browsing the web. Can anyone help me figure out how to add this feature to my phone?How do I sign up for unlimited data usage on my verizon phone?
Call customer service and they will add it for you.





If you have an online account set up, you may be able to go through there and add it on. However, the best way is just to call Verizon.