A50 In Call Screen Issues - Samsung Galaxy A50 Questions & Answers

When my partner is using the phone in call on the call screen it randomly blinks on on and off constantly making it difficult to activate speaker or hangup.
Tried clearing all apps relating to the phone, calls ect and even recovery system cache.
Android 10 Oneui2 is this a bug or an isolated issue?

Dirty screen or faulty proximity sensor

k3lcior said:
Dirty screen or faulty proximity sensor
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Thank you, worked out the problem, she has a magnetic back case and it is lipping over the little proximity sensor slightly. Need a piece shaving off the case.

Related

Proximity Sensor does not turn off screen during calls Please Help...

After every reboot,the proximity sensor works fine for the first few calls. It properly turns off the screen during a call when the device is near your ears & turns the screen on when it is moved away.
But post 4-5 calls, the sensor stops working. Irrespective of how you hold the device, the screen does not get turned off. User needs to manually turn the screen off & on using the lock button. This continues for all calls after that.
Rebooting the device fixes this problem again but only for 4-5 calls...
Can Anyone Found The Fix???
xaamaa said:
After every reboot,the proximity sensor works fine for the first few calls. It properly turns off the screen during a call when the device is near your ears & turns the screen on when it is moved away.
But post 4-5 calls, the sensor stops working. Irrespective of how you hold the device, the screen does not get turned off. User needs to manually turn the screen off & on using the lock button. This continues for all calls after that.
Rebooting the device fixes this problem again but only for 4-5 calls...
Can Anyone Found The Fix???
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Try an app called gravity screen. If it still does the same thing - works for a bit and then stops working - you may have to flash some stock software and start fresh or you may have a hardware issue. It could also be something simple like some dirt or dust in/around your proximity sensor that needs to be cleaned out; you'd have to be brave and open the phone to blow the debris out though. But try the gravity screen app first because it may be all you need.
And are you on stock ROM or AOSP/CM? Because AOSP/CM has always been wonky with the proximity sensor during calls.
startswithPendswithOOH said:
Try an app called gravity screen. If it still does the same thing - works for a bit and then stops working - you may have to flash some stock software and start fresh or you may have a hardware issue. It could also be something simple like some dirt or dust in/around your proximity sensor that needs to be cleaned out; you'd have to be brave and open the phone to blow the debris out though. But try the gravity screen app first because it may be all you need.
And are you on stock ROM or AOSP/CM? Because AOSP/CM has always been wonky with the proximity sensor during calls.
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Thanks for your Reply i am on Stock rom i reflash it again but same thing happens i also tried gravity screen app but proximity sensor is not working may be you are right its a hardware issue...
Sent from my LG-D850 using XDA Forums Pro.

On calls (touch)screen is disabled and won't turn on until call is terminated

When I make or receive calls the screen turns black and the touchscreen is disabled. I assume this is to avoid accidental keypresses with my ear or something, but my phone doesn't leave this mode until call ends.. I assume it would switch on screen/touch when leveled horizontally, but it doesn't.
I cannot end the call or do anything while the screen is disabled.
The only thing that works sometimes is to double press power button to turn on camera (thus enabling screen/touch), but it is no reliable method.
Sometimes, if I call a person not taking the call, without mailbox or automatic termination of connection, I have to reboot to phone to end this.
Any idea what I can do? Can this supposedly helpful behavior be switched off or fixed?
I am on Android stock 8.1.0 (OPM6.171019.030.H1, Aug 2018), rooted with most recent Magisk.
This bug is driving me nuts, so Thank You for any ideas or help!
Is there anything blocking the proximity sensor (below the right of the speaker)?
nowster said:
Is there anything blocking the proximity sensor (below the right of the speaker)?
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Not that I know of. All is as normal as can be.
But right now, it seems the "trick" with the camera double click works more reliably (>50%) than before. Whatever reason..
If you've had the phone apart recently ... check proximity sensor. There's a little rubber piece tends to fall out.
Did You applied a screen protector recently? I had the same issue because of screen protector was covering the proximity sensor

Proximity problem(AOSP ROMS)

Sometimes screen just turn off and wont turn on until call is done ,sometimes it works fine,sometimes it wont work at all and screen is on all the time...Anyone else had these problems?
Using latest OMNI build
Yes. I think it's quiet common. Just remove Proximity sensor. Download Magisk and disable Proximity sensor.
Yeah the proximity sensor is a little hit or miss. I keep hitting the mute button with my cheek during calls ?
I had this problem for a lot of time and just fixed it with a small piece of plastic, I cleaned the phone starting from the speaker and going both left and right while using an app that show sensors stats live, cleaning it restored full functionality, god it was so easy I can't believe it.

Proximity Sensor on Samsung A50

I'm pretty sure our A50s don't have a Proximity Sensor.
I don't use smart stay, but I do notice on phone calls that the screen sometimes goes from black to on at random times during the call. Is anyone else experiencing this? It's driving me crazy!
CiaronDarcOne said:
I'm pretty sure our A50s don't have a Proximity Sensor.
I don't use smart stay, but I do notice on phone calls that the screen sometimes goes from black to on at random times during the call. Is anyone else experiencing this? It's driving me crazy!
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A50 have proximity sensor
When the screen goes black,you're near the sensor
On the screenshot you can see almost all our sensors (Sensor Box for Android ln Play Store)
CiaronDarcOne said:
I'm pretty sure our A50s don't have a Proximity Sensor.
I don't use smart stay, but I do notice on phone calls that the screen sometimes goes from black to on at random times during the call. Is anyone else experiencing this? It's driving me crazy!
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Click to collapse
Other sensors
Arnaud Créative Studios said:
A50 have proximity sensor
When the screen goes black,you're near the sensor
On the screenshot you can see almost all our sensors (Sensor Box for Android ln Play Store)
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Ah okay. Thanks - I downloaded that app you have and tested it. When my finger is right up against it it goes to 0cm. When I lift it off slightly it jumps right up to 5cm. Is that normal? What happened to everything in between?
CiaronDarcOne said:
What happened to everything in between?
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I think pretty nothing as it is irrelevant. It is simple on/off switch for dimming screen when phone at the ear.
I guess so. I've just never noticed it so much with any other phone. I don't usually press my ear right up to the ear piece though. Usually I have about 1-2cm distance. Is there any way to increase the screen cut off distance?
CiaronDarcOne said:
Ah okay. Thanks - I downloaded that app you have and tested it. When my finger is right up against it it goes to 0cm. When I lift it off slightly it jumps right up to 5cm. Is that normal? What happened to everything in between?
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Click to collapse
It's normal with all proximity sensors
CiaronDarcOne said:
Ah okay. Thanks - I downloaded that app you have and tested it. When my finger is right up against it it goes to 0cm. When I lift it off slightly it jumps right up to 5cm. Is that normal? What happened to everything in between?
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The proximity sensor which we use in the mobile phones are with the capability of sensing any object comes in front of them . The longer it can sense is about 5 cm. The proximity sensor just sense the presence of object (within 5 cm) and not the distance between them . So it's normal.
Proximity sensor is there
Proximity sensor is present in all the phones and it is also present in Samsung galaxy a50 just that is very small and is present on top of the front camera..
By default the proximity sensor should be on for every phone but samsung galaxy phone in software it is off..
to check if your proximity sensor is on or off you would have to dial *#077692# in your keypad and the proximity sensor screen will open.. there you can the status.. if it is off there is a small button on top which would turn it on.. to check if the sensor is working properly.. put your finger on top of the front camera and if the screen goes green then the sensor is working fine without any issues..
Hope this fixes your concern..
How do i **** off proximity sensor?
CiaronDarcOne said:
I'm pretty sure our A50s don't have a Proximity Sensor.
I don't use smart stay, but I do notice on phone calls that the screen sometimes goes from black to on at random times during the call. Is anyone else experiencing this? It's driving me crazy!
Click to expand...
Click to collapse
proximity sensor is located on upper left corner just above the screen. u can see it in action during call through another camera.

Proximity sensor issue

After a few days of using this device i noticed that my screen turns on during phone calls. After doing some research it came out that the proximity sensor is not working properly when phone is being tilted to horizontal position with screen upwards. It just immediately shows that it is far away from any object even that it isn't. The fun fact is that when covering the sensor with my hand while phone is laying on his back doesnt switch it and rotating the phone to vertical position also does not make any effect like the sensor would be locked. Covering it again in that position makes it work.
Can anybody help me with this issue? It's very annoying for me and makes my phone unusable for making calls.
Edit: similar problem here https://forum.xda-developers.com/android/help/huawei-nova-5t-proximity-sensor-problem-t4136595
Same problem here...
here also
I am so lost. What do I do with the phone? What? When does it happen? (Also subscribing.)
Same here, and i notice i have also problems with whastapp and telegram audio notes.
Sometimes screen goes blank randomly and with no reason when i'm listening a audio note.
Hi. Its a well known problem. Its becouse the device has a ultrasonic sensor not like any other. Sensor like you already find out works only in vertical position of the phone. Its well described in the net how it works. Just search. In 4PDA in the section for our phone. But you need to know russian.
I found that thread and it seems that not everyone notices that... Not spending more time on reading this I found a workaround on my own: an app that keeps the screen disabled after first switching proximity sensor. Then you just need to use the power button if you want to use the phone.
Same problem here, it's very frustrating. I can turn the screen back off during a call once I see it's turned on by itself, but it keeps turning back on. I'm sick of muting calls and hanging up on people by pressing buttons when I'm on the phone.
What is the app that you are using @Spectre45?
Spectre45 said:
I found a workaround on my own: an app that keeps the screen disabled after first switching proximity sensor. Then you just need to use the power button if you want to use the phone.
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Can you please tell us what app you are using?
kage00 said:
Can you please tell us what app you are using?
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try proximity screen off or call proximity screen fix
LightSmok said:
try proximity screen off or call proximity screen fix
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Thanks
Listen. There is no proximity sensor at all. The upper mic, speaker and the sensor for orientation are doing the job. When you pick a call the speaker is sending ultrasonic signal and if it locate your ear it dims the screen. Once it works it is working in all positions. But if you move your phone away only in horisontal position it will nit work untill you mive it in vertical again.
Edit: Experienced this issue too. Annoying.
Does using Xiaomi.EU fix this problem? This issue really gets on my nerves. I started daily driving this device (finally I was able to unlock) and I just cannot use it for calls, which is kinda ridiculous from a phone.
Flashing Xiaomi.EU fixed the issue and calls now work totally fine.
I believe it's Google Dialer making all the trouble, so basically EEA default rom will always be troublesome until Xiaomi decides to fix it. This is only a theory however. All I know is that the Xiaomi.EU rom saved my phone.
I was using the phone with cover provided by MI, upon removing that back cover I encounter no such issues.
h8Aramex said:
Flashing Xiaomi.EU fixed the issue and calls now work totally fine.
I believe it's Google Dialer making all the trouble, so basically EEA default rom will always be troublesome until Xiaomi decides to fix it. This is only a theory however. All I know is that the Xiaomi.EU rom saved my phone.
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I didn't have any proximity issues on stock with google dialer. It's not google dialer, it's how you position your head against the earpiece. Sensor is ultrasonic, so it probably doesn't detect properly depending on the position people hold their phones in...
I have the same problem with my work phone - redmi note 9. Tried the app "proximity screen off" but MIUI keeps killing it no matter what i do to keep it alive. It seems that sensor is located on front top right side of the phone so sometimes it gets behind your ear if you are right handed (mine are pretty small) and then the muting starts. When using the phone with left hand - no problems at all.
I would love to have a working app to keep screen off during call.
h8Aramex said:
Flashing Xiaomi.EU fixed the issue and calls now work totally fine.
I believe it's Google Dialer making all the trouble, so basically EEA default rom will always be troublesome until Xiaomi decides to fix it. This is only a theory however. All I know is that the Xiaomi.EU rom saved my phone.
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Click to collapse
I also flashed EU rom and the problem persistes.

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