My "Find My iPhone" says on map that my phone is here at my house...but it's not! So...I guess that feature doesn't work?

I realied that part of question was less than intelligent (regarding theh phone volume being turned down), still....

I really NEED to know how accurate this "Find my iPhone" feature on iCloud is because it it's NOT 100% accurate than I'll wait to go to work tomorrow and call someone to rummage through my office to see if it's there...and not here. Because it would a long drive to work for nothing.

Well, amazingly this worked even beyond 30 ft...it was in my car, parked on the street (usually I park in my space, but not this time)--stuck between the driver's seat and the door. Of course, being a black device on a black carpet inside a black car while looking at night, it was nigh impossible to see!

So, Find my iPhone DOES work. But I think I'm going to get a bright pink or green phone case. 🙂

Thanks for all of your help. 🙂 🙂