Not able to pair my bt-03a with my android device

Have you already tried to put your headset in pairing (discoverable) mode first? Anyway, in order to do it, starting with it turned off, press and hold the 'Play' button for some 7 seconds, until the indicator light is alternately lit in blue and red. It is in pairing mode now. Then, withing a couple of minutes, on your phone, go to 'Menu > Settings > Wireless & network > Bluetooth'. If the bluetooth radio is not turned on, turn it on. Then, tap 'Scan for devices'. After a little while, your headset should appear on the phone' screen. Tap over it to make it connect. If a pairing code (or PIN, or passkey) is requested, enter '0000' (four zeros, without the quotes). If the pairing process is succesful, your headset should enter the stand-by mode. An indication that a heaset is connected should appear on your phone too. If your phone indicates that only phone calls are available, tap and hold over it, until a context menu comes up, and select 'media', in order to make streamed music ffrom your phone sound on the headset.
Hope it works for you.
Anyway, please, let me know if you need further informations.
Regards,Carlos