To be fair, I only had the phones for 1 day before I mailed them back. The mic did not work as another reviewer indicated. I have a Blacberry Pearl & read on some forums about these but I did not think the bass was good at all. I don't believe they were true stereo headphones--i don't know if this was same situation as previous reviewer noted where he had to pull out the connector slightly to hear true stereo, but that defeats the purpose of the purchase. I know per many forums that the Pearl has issues w/stereo, but should be overcome by headsets such as these b/c of their 2.5mm tips with 3 or more circles on the end. The box made them look cheap as well as I have seen a box of normal Sennheisers that cost more than these so immediately it got me thinking the quality was going to be that good. I guess I'm spoiled w/more higher end headphones, but b/c I've heard much about the name, I thought I couldn't go wrong. Will have to read on more types to see which ones I want