Install for Improvements to Incoming Calls
If you receive a ton of phone calls on your Galaxy S10, you're probably going to like the improvements Samsung's made to incoming calls.
With Android 10 and the One UI 2.0 on board, you get some new options for displaying phone calls in the Phone application.
You can either get them as full-screen alerts, popups (similar to how it is on stock Android), or small floating popups.
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If you choose to receive them in pop-ups, you can leave the call in the popup as you go about your business. It's pretty nifty.