LG phone proximity sensor not working — screen stays black on calls (what to check first)
Steve H.
Reviewed for technical accuracy
Specialities: LG call screen goes black, proximity sensor not working, screen won’t wake during calls, can’t use keypad/speaker/mute, pocket mode issues.
LG proximity sensor issues: common reasons + safe checks (case, screen protector, dirt, settings, updates)
Technician
• the screen stays on during calls and taps buttons with your cheek, or
• the screen goes black and won’t come back, so you can’t hang up, use the keypad, mute, or speaker.
We’ll check the safest things first. I don’t want you to change a bunch of settings at once and end up with a new problem.
Quick questions:
• Which LG model is it (G, V, Stylo, K series, or another)?
• What exactly happens during a call: black screen that won’t wake, or screen won’t turn off?
• Did this start after anything changed (new case, new screen protector, drop, or Android update)?
Technician
First, a calm safety check: when the screen goes black, does it ever wake if you press the power button once, or tap the screen, or does it stay dark until the call ends?
Also: do you use a flip cover, a thick case, or a tempered glass screen protector?
Technician
Trust moment: I don’t want you to peel anything off permanently yet. We’ll do a simple, reversible test first.
Safe test: on the next call, can you try it once with the case removed? If that feels like too much, tell me and we’ll choose an even gentler check.
Technician
Common reasons it can start suddenly:
• a little skin oil, lotion, or dust builds up near the sensor area
• the phone gets a software update and call-screen behavior changes
• the screen protector shifts slightly after a pocket/bag bump
• a setting related to call screen, accidental touch protection, or pocket mode changes
Before we touch settings, one safe check: is the top of the screen (near the earpiece) clean and dry? Even a smudge can affect how the sensor reads.
Technician
Trust moment: I’m not going to tell you to factory reset or install random apps. We’ll start with the least risky checks.
Two simple tests that give us strong clues:
1) Place one short call with the case off. See if the call screen wakes normally.
2) If it still goes black, gently wipe the top front area with a soft, dry cloth (no liquids). Then try one more call.
Technician
• If removing the case (or temporarily lifting the protector edge near the sensor area) changes the behavior, it’s usually obstruction, not a broken sensor.
• If the problem happens only in the Phone app after an update, it can be software.
• If it happens in many situations where the top area should respond (for example, screen always turns off even when the phone is on a table), then hardware becomes more likely.
One question: during a call, do you use speakerphone often, or do you hold it to your ear?
Technician
A gentle “what to check first” list for LG phones:
• Make sure the protector isn’t covering the top cutouts (earpiece/sensor area).
• Try a call with the case off.
• If you have a flip cover, keep it folded fully back during calls.
If none of those change anything, the next safe test is Safe Mode (it helps rule out a third-party app interfering).
Technician
Trust moment: I don’t want you doing big changes. Safe Mode is only a test, and you can exit it by restarting normally.
If you’re comfortable later, we can do this: test one short call in Safe Mode. If the proximity sensor problem disappears there, we know it’s likely software/app-related.
Technician
That’s why we start with physical causes (case/protector/cleanliness) and then do a simple software check (restart, Safe Mode).
If you do the case-off call test and tell me what happens, we’ll know which direction to go next.
Technician
• Did it begin right after an update?
• Does it happen only in the Phone app, or also in other situations?
• Does Safe Mode change it?
With those answers, you can decide calmly whether a setting needs adjusting, an app should be removed, or whether it’s time for a simple hardware check — without guessing.
Quick answer: the accepted fix
Accepted first fix for an LG phone proximity sensor not working issue: rule out simple blockage and “call screen” glitches before changing major settings or assuming hardware failure.
What usually helps most (safe steps):
• Remove the case/flip cover for one test call and see if the call screen behaves normally.
• Check the screen protector alignment near the top cutouts; a slight overlap can confuse the sensor.
• Gently clean the top front area (earpiece/sensor area) with a soft, dry cloth.
• Restart the phone and test one short call again (one change at a time).
• If it began after an update, test in Safe Mode to rule out an app interfering with the call screen.
Why this starts suddenly on LG phones (and why it’s often not “broken”)
When the proximity sensor on an LG phone acts up, it can feel like the device is failing — but many cases start from a small change. A slightly shifted tempered glass protector, a case lip near the earpiece, or a smudge from lotion can cause the sensor to read “near” all the time, which makes the screen go black during calls. After an Android update, the Phone app can also behave differently, and some accessibility or “accidental touch” features can change how the call screen responds. The goal is to confirm the cause with safe tests before any big decisions.
What to check first when the call screen is black or won’t turn off
Start with simple, reversible checks. Make one test call with the case off, and make sure nothing covers the top sensor area. If the screen is black and won’t wake, this often points to the sensor being blocked or confused. If the screen stays on and your face taps buttons, that can also mean the sensor isn’t detecting “near.” If you want a clean software comparison, a short test call in Safe Mode helps show whether a third-party app is involved — without deleting photos or contacts.
Gentle troubleshooting tips for seniors (LG proximity sensor during calls)
Most call-screen sensor issues come from a blocked sensor area, a screen protector edge, a case/cover, or a recent update.
Best approach: change one thing at a time. Start with the easiest test — remove the case for one call. Then clean the top front area with a dry cloth and check that the screen protector isn’t covering any top cutouts. If the problem started after an Android update, a Safe Mode test can be a helpful “yes/no” check for app interference. Avoid big changes (like resets) until you’ve collected these simple clues.
Disclaimer: This information is AI-generated and intended for general guidance only. Avoid making multiple system changes at once. For device-specific steps, consult a verified expert on Whizz-Tech or the manufacturer’s support before making decisions.
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FAQ
Why did my LG proximity sensor stop working suddenly?
This often starts after a small change, like a shifted screen protector, a case edge near the earpiece, or a smudge from skin oil or lotion. The sensor can read “near” when nothing is there, so the screen stays black during calls. It can also happen after an Android update when the Phone app behavior changes. Start with safe checks: case off for one call, clean the top area, then compare again.
My LG phone proximity sensor stopped working after an update — what now?
After updates, call-screen behavior can change, and some phones become more sensitive to cases or protectors. First, do the low-risk checks: remove the case for one call and clean the top sensor area. If the issue persists, a Safe Mode test call can help show whether another app is interfering. Avoid big changes like factory resets until you’ve confirmed these basics.
Is it hardware or just settings (or a case/screen protector)?
If the problem improves when the case is removed or the protector isn’t covering the top cutouts, it’s usually obstruction, not broken hardware. If it happens only in the Phone app and changes after updates, it can be software or settings. If Safe Mode changes the behavior, an app is likely involved. If nothing changes across these tests, hardware becomes more likely, but it’s best to decide with evidence.
Can this be fixed without service?
Many people can improve it with safe steps like removing the case, checking screen protector alignment, and cleaning the top sensor area. Restarting and doing one short test call afterward can help confirm if it was a temporary glitch. If Safe Mode shows improvement, you may avoid service by addressing the conflicting app or setting. Service is more appropriate if the sensor area is damaged, the screen behavior is erratic in every test, or the problem began after a physical impact.
Sources
- Android Developers — Position sensors (includes proximity sensor overview)
- Google Support — Find problem apps by rebooting to safe mode on Android
- Sony Support — Proximity sensor and call screen behavior (cleaning/case checks)
- Android Central Forums — LG call screen/proximity sensor case-blocking discussion
Filed under: Screen Display Issues
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