How to pinpoint exact iPhone location?

I used find my iPhone, and it says it's out in the middle of the road. I know for a fact it isn't there, but I'd like to find a way to find my exact iPhone location, so I can find where it is in my house. I tried playing a sound, but it wasn't audible, so I'm guessing it is in the couch or something. Is there a way to for sure find out?

If it's in your own house, and the sound won't play, Find my iPhone won't help you find it by GPS coordinates. That comes within about 50-100 feet. Not inches. Keep the sound going and get off the duff and turn the house inside out until you find it. Best luck.

Its loud when it beeps, you should hear it. Keep walking around and listening.

If its in your own house, and the sound won't play, Find my iPhone won't help you find it by GPS coordinates. That comes within about 50-100 feet. Not inches. Keep the sound going and get off the duff and turn the house inside out until you find it. Best luc