Once your earphones and your mobile phone have been paired to each other, all you need to do is check that Bluetooth is activated on your phone. The small Bluetooth icon should be visible in the status bar at the top of the phone screen.

Then switch on your earphones and the light on the right earphone should turn green almost instantly.

If the light stays blue, this means that the earphones were unable to connect to the phone. In this case, go into your phone's Bluetooth menu and click on ONEAR 500 in the list of nearby devices.