If I were to buy a phone holder for my bike, it would need its own suspension in order to keep my phone from flying off haha
Congrats on the new ride! Make sure you learn how to use the adjustment features on your rear and front suspension. It can be nice to dampen one or both when riding on aggressive terrain, that way the shocks aren't violently firing back up every time you hit an obstacle.
Dampening your suspension and sometimes even letting some air out of your tires (depending upon the terrain) can be hugely helpful for improving rider comfort and for avoiding getting flat tires. Underinflated tires can cause pinching and puncturing when you hit a bump, whereas overinflated tires can lead to blowouts. Your bike may come with a recommended pressure and you can easily buy inexpensive gauges for measuring, but it will quickly become something you can learn how to eyeball.
You may already know about all of this. Just trying to help and offer some advice! =-D