A:AnswerIt’s on the receipt when you purchased them. If you never used the free trial from Apple that means you’ll get to try out for free for 3 months. If you have used it before, then it won’t work for you.
A:AnswerYes. I'm currently using the AirPods with my Note 10+ and they work great. I cant see their battery level, so I think that's a downside to having them with android but I still feel more comfortable with the AirPods than any other bluetooth wireless headset.
A:AnswerNo. However, if I'm not mistaken I was told by numerous people that apparently you can go to the apple store and purchase what you lost instead of replacing the whole set. So if you lost the case, then you could go buy another case. If you lost one airpod then you could go purchase the set instead of re-buying everything.
A:AnswerI use them in the Sonoran Desert heat in the summer sweating excessively and they work great. I have also used them on a treadmill without any issues.
A:AnswerYou have to hold down the button in the back until the led flashes white. That puts it in discoverable mode so you can use them as regular Bluetooth headphones.