Apple phone bluetooth how can discover each other bluetooth

Settings--General--Bluetooth--Bluetooth switch--Below the device is what is searched for --Select the one you want to link --Enter the four matching password (the device's should be the same as the phone)

Apple's Bluetooth can only match products like Bluetooth headset, car audio devices and Bluetooth keyboard, location navigation.

Apple's Bluetooth is not able to pass information to others.

It is important to note that not all devices are compatible with iphone.