Android Incallui: //free\\

Bug alert: On many custom ROMs, a broken proximity driver causes InCallUI to crash, leading to the infamous "System UI isn’t responding" during calls.

Historically, InCallUI was monolithic. Today, it operates as a collection of interacting services: android incallui

The InCallUI is a paradox. It is the most critical screen during a phone call, yet most users never think about it unless it breaks. It juggles hardware sensors, multi-party call states, accessibility features (TTY, RTT), and carrier-specific quirks – all while remaining responsive enough to not drop your call. Bug alert: On many custom ROMs, a broken

Developers rarely modify InCallUI directly unless they are building a custom ROM or a full Dialer replacement. However, app developers interact with the result of InCallUI. It is the most critical screen during a

Uses com.samsung.android.incallui , which integrates with One UI features like "Call Backgrounds" and "Bixby Text Call".