Pokémon GO quickly became a worldwide cultural phenomenon after it launched in the summer of 2016. In a mere 20 days, the augmented reality app became the most downloaded, topped most international charts, and grossed $100 million. It has since been downloaded more than 500 million times. But despite its success, the app’s users have faced some significant, headline-making experience issues.

The game’s popularity has remained steady after its maker, Niantic, took quick action to fix the bugs and compensate affected players. But the story goes to show that even the most successful apps are not immune to mobile quality challenges. Read on for five best practices for upleveling your mobile testing strategy so you can stay out of the headlines and give your users the best experience possible.