The very first time I turned these on I thought "....WOW!...". They sounded like nothing I'd heard before (...I'd only had cheapies before.) The sound was beautiful. However the advertising indicated there was voice control, which is only true if you download an "update" through your phone. Either the Update is faulty or not all older phones are compatible? My iPhone 5s would not update it, while my sons 6s would only update 1 bud, not the other. Afterward 1 earbud would not work, and there was still no Volume Control. Check other revues and you'll see 1 bud not working after "update" is commented on a few times.