Last updated on December 10, 2025
Even in late 2025, your Samsung Galaxy S21 Ultra is still a powerhouse. Released back in 2021, this device continues to impress with its robust hardware and advanced software capabilities.
But are you truly getting the most out of it? Samsung’s One UI overlay is packed with extensive customization and advanced features, many of which aren’t immediately obvious.
Unlocking these hidden features can significantly boost your daily user experience and make your device even more efficient. Imagine streamlining your workflow or finding a quicker way to access your favorite tools – that’s what we’re aiming for.
Quick Wins: Instant Enhancements for Your S21 Ultra
Ready to make your S21 Ultra even smarter and more personal? Here are a couple of quick tips to get you started with some of the top hidden features S21 Ultra users often overlook.
- Smart Home Controls at Your Fingertips: Did you know you can quickly access your smart home controls right from your Quick Settings panel? A simple swipe down gives you instant command over your lights, thermostat, and other connected devices without opening a separate app.
- Personalize Your Lock Screen and Side Key: Another great way to boost efficiency is by personalizing your lock screen shortcuts and the side key. You can set these up for instant access to your most-used apps or functions.
For instance, you could set your side key to launch your camera with a double-press, or have your smart thermostat appear on your lock screen for easy temperature adjustments before you even unlock your phone.
