A:AnswerNo it doesn't have inbuilt sleep tracking. You will have to download third party apps from the app store which will help monitor your sleep patterns.
A:AnswerYes, your Bluetooth headphones can be connected in the settings of your Apple watch and you can sync songs to your Apple watch so that when you are away from your phone they are available
A:AnswerDepends on the type of watch you get. If you get the GPS only then it will only connect to your phone when you are around your phone. If you get the GPS plus cellular then yes you can connect your cellular device to your phone using your own cell service and it will work.
A:AnswerThe only thing the watch needs is your iPhone to pair to since it’s not the cellular data enabled watch. If the watch has data compatibility then it might possibly matter. But the simple series 3 with gps it doesn’t matter what carrier service you have. But on the cellular watch it might.
