Facing Blank White Screen During Receiving Call? Android Fix (2026)

An incoming call rings, you wake the phone, and the display is a blank white (or empty) call screen — no Accept/Decline, no contact photo, sometimes no controls at all. Audio may still work. That pattern points at the in-call UI, not necessarily a dead digitizer.

This guide covers InCallUI crashes, overlays, IMS/VoLTE quirks, force-restart recovery, and when to stop DIY and prepare a repair handoff.

What component draws the call screen?

On Samsung and many Androids, the full-screen call experience is handled by packages like InCallUI (for example com.samsung.android.incallui) working with the Phone/Dialer app. When that process crashes or fails to compose the layout, you get white, black, or frozen glass.

Read the package-level explainer in what is com.samsung.android.incallui if App info or battery lists that name — freezing or “optimizing” it with debloat tools is a common way to create this bug.

Quick ways to answer anyway

While you fix the UI:

• Pull down notifications and use Answer there
• Press a Bluetooth headset call button
• Try the Power or volume shortcuts your OEM maps to answer
• Flip to speaker via connected car Bluetooth if the UI is blank but the call audio routed

Do not keep force-stopping Phone mid-ring — that can drop the call without fixing the draw bug.

Overlays and “screen filter” apps

Any app that draws over the dialer can leave a white surface where buttons should be:

• Blue-light filters
• Chat heads / bubbles
• Local VPN always-on status overlays
• “Call recorder” float buttons
• Dust / notch filler apps

Disable Display over other apps for suspicious packages, reboot, and have someone call you. If the UI returns in Safe mode, uninstall recently added overlay tools.

Cache clear and dialer repair

Order that avoids unnecessary data loss:

1. Update Phone, Contacts, Carrier Services from Play or Galaxy Store
2. Clear cache for Phone and InCallUI (names vary by OEM)
3. Reboot
4. Test with a second phone calling you
5. Clear data for InCallUI / Phone only if still white

Also toggle off aggressive themes or third-party icon packs that skin system call UI.

IMS, VoLTE, and white screens

Some blank screens appear only on VoLTE / Wi‑Fi calling paths: the radio answers, the UI never finishes binding. Learn what that stack is in what is the IMS service on Android, then try:

• Toggle VoLTE off temporarily and test a call
• Toggle Wi‑Fi calling off
• Airplane mode 15 seconds → reboot
• Reset network settings (keeps photos; drops Wi‑Fi passwords)

If calls look fine on 3G/legacy fallback but break on LTE-only VoLTE, tell your carrier — provisioning can be on their side.

When the whole phone is wedged

If the white field stays after the call ends, or the UI is frozen system-wide, use a proper force restart for a frozen phone instead of holding random combos for minutes. After restart, retest an incoming call before changing more settings.

Themes, Good Lock, and post-update bugs

Custom modules that modify the call screen break after One UI / Pixel updates. Disable Good Lock call-related modules, remove unofficial call UIs, and reboot. If the issue started the morning after an OS update, check for a Phone app update for several days before factory reset.

When to stop and prep for repair

DIY is done when:

• Blank call UI continues in Safe mode
• Multiple dialer apps fail after cache clears
• The whiteout happens in other system apps too (GPU / display pipeline)
• The device was dropped or liquid-exposed recently

Then follow before sending a phone for repair: back up, remove accounts as required, note exact repro steps (“incoming VoLTE from contact X shows white; Accept missing”), and avoid last-minute unauthorized root tools that void the visit.

Pop-up incoming calls vs full-screen intent

Many OEMs let you choose full-screen or pop-up for incoming calls. A buggy full-screen transition shows white while the pop-up banner still works. Switch to pop-up temporarily under Phone settings → Call display / Incoming call style, then update the Phone app and try full-screen again later.

Caller ID and spam-app overlays

Third-party caller ID tools draw their own layers on top of InCallUI. When their overlay fails, you see white. Disable Hiya-style overlays, OEM “smart call” experiments you do not need, and any “call recorder floating bubble.” Retest with only stock caller ID.

Secondary users and work profiles

Incoming calls to a personal SIM while you are inside a work profile can show a blank handoff screen. Switch to the personal user, or answer from the lock screen before unlocking into the work profile. Report to IT if only managed devices show the bug.

Accessibility services

Display filters, color correction, and magnification that follow the pointer can break call-screen composition. Toggle Accessibility services off for a test call. If the UI returns, re-enable services one by one.

Logging for support

Note: phone model, Android/One UI version, whether VoLTE icon was on, whether Safe mode fixed it, and whether the blank screen is only for contacts with photos. That detail helps carrier and repair desks more than “white screen sometimes.”

SIM toolkit and carrier apps

Carrier “visual voicemail” and SIM toolkit apps occasionally inject UI on incoming calls. Disable updates to those carrier extras or turn off their draw-over permission, then retest. If the blank screen only happens on one SIM of a dual-SIM phone, move the line or update that carrier package first.

Related FixingHacks guides

• What is com.samsung.android.incallui
• Force restart a frozen phone
• What is the IMS service on Android
• Before sending a phone for repair

Bottom line

A blank white screen on incoming calls is usually InCallUI/dialer failure, an overlay, or an IMS/VoLTE glitch — not instant hardware death. Answer from the notification shade if you can, strip overlays, clear Phone/InCallUI cache, test Safe mode and VoLTE toggles, and only then reset networks or prepare a repair handoff with notes.