With Nexus 6P. I Jamie Corbett posted on the Google Product Forum that he faced the issue of( muffled voice) quality while using the headset. But on speaker the calls would sound ok.Screen Size- 5.70-inch. Resolution -1440x2560 pixels.Storage- 32GB. Processor- 2 GHz. RAM -3GB. Rear Camera -12.3-megapixel. Front Camera- 8-megapixel.OS Android -6.0. Battery Capacity- 3450mAh. Dangerous & against the law in my state.My friends owns a Samsung Note 4 and we have tried pairing both the watch and car stereo with his phone. The pairing goes fine and the Bluetooth works flawlessly.There are several threads online that have many 6P owners complaining about similar Bluetooth connectivity issues. They have offered many suggestions about how to( fix this problem) .