There are many applications available which facilitate you to connect your iPhone to a wireless camera and using your iPhone as a monitor. There is no reason to mount your iPhone if you already have an IP Camera or security camera. Before investing in paid applications, you can have a free trial of the applications, and this is the best way to get a fair idea of what a security camera might do for you. You just need a right application to run it, and it's much easier than you may think. There are several applications for this purpose – Free or Paid. To turn your old iPhone into a webcam, you may also need to update the version of your phone which can support the security camera application. You need a place to mount your old iPhone, power supply, internet and application to run it.

Let iPhone as a security camera or monitor