If you were somehow able to remove IncallUI, your phone calls would become incredibly difficult to manage. You wouldn't be able to hang up, switch to speaker, or dial numbers during a call. It is a core utility, much like the "Settings" app itself.
Incallui offers several benefits to users, including: what is android incallui
When you make or receive a call, the screen you see — with the caller ID, answer/decline buttons, mute, speakerphone, keypad, and end-call options — is generated by InCallUI. It’s part of the Dialer app’s underlying code but can be updated separately via system updates or vendor customizations (e.g., Samsung’s One UI, Google Pixel’s Phone app). If you were somehow able to remove IncallUI,
In short:
If you see "Android IncallUI" in your Google Activity or battery usage, it simply means that you made or received a phone call during that timeframe. Incallui offers several benefits to users, including: When