Of course, you know that your phone has to support A2DP in order to get stereo sound. If that aspect is okay, perform a system reset: While plugging in the AC charger, hold the power/pair button. The headphones will show a solid red or blue light when they have been successfully reset. If it's still giving you problems, contact Plantronics at 800-544-4660 x5 x5538 for warranty service.
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Of course, you know that your phone has to support A2DP in order to get stereo sound. If that aspect is okay, perform a system reset: While plugging in the AC charger, hold the power/pair button. The headphones will show a solid red or blue light when they have been successfully reset. If it's still giving you problems, contact Plantronics at 800-544-4660 x5 x5538 for warranty service.
Good luck from Headsets Direct!