A:AnswerNo. While you can use a cellular Apple Watch while using an Android phone, the watch won't pair to the phone, so they won't exchange data. You would also need an iPhone to setup the watch.
A:AnswerTo use the cellular option of the watch you need to have a “service” with your carrier to utilize it so you would have to open another “line” on your account but that’s if you want to use cellular.
A:Answerapproximately 15 feet. however depending on the structure and surroundings it may work further. I left my phone in the car for a Dr. appointment and well over 100 feet away it worked - but only a window was separating me from the direct line to the phone.
A:AnswerYou can download the Spotify app on the watch. However you can not stream music through the watch itself. You can however connect a speaker or headphones to the watch itself via Bluetooth and still leave your phone in the locker.