Hello, I'm looking into buying an LG 4. If I follow the steps to purchase the phone it's $654, if I choose to add it to a tab, it says that it's $50 upfront for the phone and $15 month for 24 months on Tab. So, $15 x 24 months + $50 upfront =410 for the device. That's 244$ cheaper for the device on the tab. Am I completely missing something here? I'm on a $49 plan for 1gb, no tab.