The only things my data usage shows is Mobile Data on, off, Set mobile data limit, alert me about data usage, data usage cycle, names of apps and how much data each used. In the upper right corner it says auto sync data, show WiFi usage. There is nothing in my data usage setting stating enable background data.
You have to have the mobile data on and a limit set for the restrict background data options to be available.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.