When an app needs to be absolutely sure it won't be cleared from RAM by Android's memory management system, it posts a persistent, ongoing notification. Another time you'll encounter non-removable alerts is when your phone or carrier really wants you to do something, like apply an update.
Bloatware is a problem on Android, and it's not just a Samsung thing. Removing apps that have the Uninstall or Disable button grayed out in Settings has always involved sending ADB commands to your phone from a computer, which itself was always such a pain to set up. Thankfully, that has finally changed.
Codecs are like ZIP archives for media files. Rather than storing an entire analog sound file, the digital version is compressed to save space. The algorithm used to reduce file size is called a codec, as it encodes to digitize and decodes when it's time to play the file back. So as you can imagine, a better codec can lead to drastically improved sound quality.
On a PC, you can play sound from multiple apps at once. It's great, but it can also be confusing — there's a volume slider in each app, then the system-wide one, and probably another knob on your speakers. To avoid this dysfunction, Android only has one sound stream for media. But that has its own problems.
If you scan the notification panel on your Samsung Galaxy smartphone daily, all those red circles with numbers that litter the apps on your home screen and app drawer can feel like persistent nagging and unnecessary clutter rather than friendly reminders to check your app alerts — but you can do something about it.
Samsung has a cool security feature built into One UI that has an interesting side effect, one that lets you have two separate copies of any Android app on your Galaxy phone. And that's not the only integrated Samsung tool for cloning apps.
How To: Activate Your Samsung Galaxy's Vault to Keep Your Apps, Files, and History Safe from Prying Eyes and Hackers
One UI has an exciting privacy feature that lets you lock apps, photos, videos, and files on your Galaxy device behind Samsung's defense-grade Knox security platform. Only you can unlock it using a pattern, PIN, or passcode, or with biometrics like fingerprint and iris locks. It's like having a safe built right into your smartphone, and it couldn't be easier to set up.
Back when Android used navigation buttons, there was a large black bar at the bottom of every screen to house the back, home, and recent apps buttons. But after switching to full-screen navigation gestures in 2019, there was no longer a need for it — however, a vestigial black bar still shows up when you're using your keyboard.
With Samsung's One UI 3.0 update, the main on-screen volume slider has a little menu button on the top of it. Tapping this will expand the slider into a full-blown volume panel, complete with controls for all of the various types of sounds your Galaxy might make. Standard stuff, really, but there's more to it.