Most of us have an old smartphone lying around, gathering dust in a drawer somewhere. Instead of letting it go to waste, why not put it to a whole new use? With just a few tweaks, you can transform that old phone into a fully functional security camera that you can log in to from anywhere – so you can always be sure that your home is safe and secure. So long as the rear camera is working, any phone can be used, and best of all, it’s usually completely free! Here is a step-by-step guide on how to do it.