Biggest frustration today is when we loose our beloved cellphone.  This is not just about the calls and contacts, it has lot of other information such as valuable photos, vedios, message etc.  We can have apps for following scenarios to help in this suituation:

1. Need to have reserve battery feature. This battery will be used for running a background process, which runs just like clock, even if you switchoff.  So when the cell phone is lost, we need to sent secret message (kind of passphrase ) to our phone, which will return back the text to us on the location and as well as ring.