I had a similar issue pairing my Jabra headset with my Galaxy S3. Turns out the issue was because my Jabra was already paired with my previous phone. I had to force my Jabra into pairing mode and presto, my S3 found it instantly. To force a Jabra into pairing mode, assuming it is turned off, press the universal button to turn it on and keep it pressed until the LED stops flashing and changes to a solid light. Turn on bluetooth on the S3 if off or re-scan if already on and Bob's your uncle. 
