The Idea: Cell-Jack

In today's modern world, every man and women is tethered to this earth by a piece of hardware no bigger then a computer mouse. This hardware is vastly important to a vast amount of people for many reasons. It's used for business, pleasure, family, and without it one could consider themselves utterly disconnected from the world around them. I'm of course talking about the "cell-phone", and my idea will take away any worries of losing or misplacing it.
The idea is I would invent a "Lo-Jack" for the cell-phone. The "Lo-Jack" for the computer allows one to track down a lost or stolen computer, even allowing one to delete the data off it so it cannot be viewed or stolen. The "Cell-Jack" would be installed like an App, with every installation having it's own unique login/password for the "Cell-Jack" website. If a cell-phone is misplaced or stolen, you would just log onto the site where their will be many options. Some of these options will be simply activating the GPS beacon if battery is left, deleting personal data, locking the phone, or activating a battery reserve in case the phone dies.