It's actually a pretty good idea if it works with your car alarm in your house, try it and see. I just did but in Mine it doesn't... Moot point for Me anyway, I keep My piece and spare mag by the bed ALONG with My cell, with quite a few others well hidden around the house. Feel nothing but pity for anyone who breaks into this house.

For the record, YES, I'm a certified gun nut, yet if had to choose between taking one of My guns, or My cell somewhere, and I could only take one, it'd be the cell EVERY single time. Bringing one gun means you're one person with one gun... having a cell means you can call many people with not only guns but medical equipment, firefighting equipment, etc...