I bought a pair of s9s(well thats what i thought they were) on ebay about 2 months ago. I didnt really research to much, just thought they looked like what i wanted. well worked well in the past. but when i was at the gym the other day using them. my phone just kept randomly calling people. i knew it wasn't the droid so i shut off the blue tooth and it stopped. Well now i have done a little research and found that there are knock off s9s all over ebay and thats what i ended up with and after examining my pair a little closer i can see that they are. Please be warned that once again you get what you paid for. i went to Best Buy yesterday and spent the big bucks and got me a new authentic pair of s9 hds. Cost 79 plus tax but after listening to them i feel it was worth it. So be warned.