Originally Posted by ZepTepi
If you've lost it while, say, out on a date and don't recall where you last had it why couldn't you zero in on it with google maps then go there and ring it?
Have you tried Tasker? I have many many many uses for Tasker, and among them is phone location.
I can text a keyword to my phone, from any other cell phone, and my phone will automatically turn on its GPS and find its location, moving speed, and battery life... then text all that information back to me, including a link to google maps to pull up a visual of the location (send this to whatever number I texted from), then turn the GPS back off to conserve battery life (granted, the GPS option isn't currently available on stock ICS phones since google locked it out).
It's fully customizable, where I could also have it lock my phone, or turn on an alarm so I can hear it, or call me back so I can listen to what's happening around my phone.