Is there any way to find a mobile in your house thats turned off ? like walkin round with a radio mayb ?

Lol I wish.......my daughter hid mine the other day and it was on silent I turned the house upside down and spent ages looking for it and in the end gave up - I said to my daughter later mummy really needs her phone and she walked into her bedroom and took it out of her dolls cot lol!!!! Grrr I looked everywhere except there so look in the last place you would expect to find it!!