I am unable to use the "newer style" Bluetooth headsets that wedge into your ear due to fibromyalgia syndrome (causes extreme pain in side of face).These are good dependable headsets. I always have to so while one is charging I can use the other.Last one died after two years of heavy use (2,000-5,000 minutes a month). I have another that is 4 years old and has been thru a full wash/dry cycle (left it in pocket) and ironically still works good (not as good as new one but still acceptable).For the money these are a good deal and MUCH more comfortable than the headsets in retail stores. In the past I used these on misc LG phones and a iPhone 3GS. Currently I am using it with a iPhone 4 and don't have any problems.