Why can't my ipad2 and iPhone4 and 5 recognise each other as devices using bluetooth?

Why can't my ipad2 and iPhone4 and 5 recognise each other as devices using bluetooth?

Bluetooth should allow me to connect to other devices to transfer data like photo's, music, files, whatever between my apple devices and non apple devices.

Other phones allow me to do this..........what is happening here?

An unhappy apple devices owner.

I want to know who I complain to if this is how Apple devices operate.

Any answers anyone.