Summarize this article in one sentence.
Cellphones have never been so fragile and prone to scratching as they are today. Screen protectors are commonplace, and you should invest in one if you're the slightest bit worried about damaging your phone. Common phone protectors aren't generally too expensive, and they'll be much more affordable than replacing your screen or phone if the damage is bad enough. Higher-end protectors are virtually unbreakable, while affordable brands will at least take damage so your phone proper won't have to. Between a plastic screen protector and tempered glass protector, you are better off investing in the latter. Tempered glass protectors offer better durability, visibility, and comfortable feel. Most of the time your phone is scratched or damaged, you'll be on the go somewhere. It's important to consider where scratches come from and how they're most likely to be made. Put your phone in a separate pocket than your keys or coins. If possible, place your phone in a zip-up pocket to prevent it falling out accidentally. Don't put your phone in your back pocket. On top of risking cracking if you sit down on it, there have been reports of it causing nerve problems due to the pressure it creates on your backside.

Summary:
Purchase a screen protector. Stow your phone somewhere safe.