So, last night I visited Walmart (yes, this was my first mistake) and I left my iPhone 5s at the checkout. My friends and I turned around as soon as we realized it was left behind and no one had turned it in (of course). I logged in on a friends phone to Find My iPhone and it pinged right in the store still! (YAY!) So we played the sound, and thought we heard it chirp a couple times and then it stopped. We wandered the store and even involved the cops (we thought a couple sketchy looking Walmart Associates had it, because they were sitting right where we thought we heard the sound coming from). Has this ever happened? I know if it is on silent, it SHOULD still play a sound. The phone had about 20% battery at this time. The Find My Phone ap is still pinging it at Walmart ( its been about 7 hours) but it is saying the phone has 0 battery. BUT if it was at 0 battery--why would the ping still update as being at Walmart with a green circle? Words of wisdom, other than wandering Walmart more?