My iPhone 5 won't find any Bluetooth devices?

Hi. My ip5 just continually says "searching" whilst trying to pair with nearby Bluetooth devices. It never finds any and just says "searching" for hours. Is it something I'm doing wrong?

You need to make sure the other devices are actually on discoverable and open otherwise the 5 will have nothing to seek

Plus the device has to be an accessory, not another phone.