The Bluetooth(R) technology in Jawbone(R) is designed to work seamlessly with any Bluetooth enabled handset. Even though Bluetooth is a universal standard, not all Bluetooth is created equal certain CDMA phones (e.g. phones found on Sprint and Verizon Wireless) can under perform when compared to certain phones found on GSM networks such as Cingular. We have specifically optimized our headset to work flawlessly with all phones on the Cingular Wireless Network. While Jawbone is known to work well with many CDMA phones, there are a number of CDMA phones on the Verizon and Sprint networks which will experience issues regarding sound quality and pairing. It appears yours may be one of the CDMA phones that is experiencing these issues. Jawbone is working fast and furiously to resolve these compatibility problems with CDMA phones. Our expectation is by late June or early July we will release a CDMA version of Jawbone to resolve all known problems. In the meantime, if you are unhappy with the performance of your Jawbone and use Jawbone on a CDMA network (e.g. Verizon or Sprint), we suggest you return Jawbone to your place of purchase. You can do this by calling 408-848-4348 at your convenience (someone is there 24/7) and they will process your return request. We apologize for the inconvenience and appreciate your understanding, Aliph Customer Support Team