Develop Bugs

[Q] Can you only use the power button to unlock the screen?

Can anyone unlock the phone using home button ?
it only works with the power button for me. The home button works when the screen is on but not when , the screen is turned off the phone flashes for brief second then screen goes off, i noticed this before i downgraded and after it has always been like this, its like I am double tapping it when I am not . I get the same response if i double tap the power button

Just to be clear. Are you asking if the screen turns on and stays on after pressing the Home button while the screen is turned off?
I'm on unlocked 3.6.8 and if my screen is off, I can press the home button and the screen turns on (still have to slide to unlock or enter PIN). However, the screen does stay on for a period of time and I can sit and look at the lock screen, view the dynamic perspective on it, etc until the timer eventually shuts the screen off again.

If the sensor located below the front camera is covered up with a screen protector or anything else then you can have problems turning the phone on with the home button or the camera button.
All screen protectors with a hole for the sensor should work on the phone. Screen protectors without a hole for the sensor may or may not work. My screen protector doesn't have a hole for the sensor but I don't have a problem turning the phone on with the home button. But if I cover the sensor with my thumb I can not turn my phone on with the home button.

Proximity Sensor Re calibration?

I have an issue with the proximity sensor on a LG G4 H810 (AT&T).
Out of a batch of 5 devices, all using the same Verizon branded tempered glass screen protectors (on AT&T devices), one of them refuses to work with the glass protector installed.
It's crystal clear, but when its on there and you dial a number, the screen immediately turns off (black), and you cannot force it back unless the call is ended by the other person.
Taking the glass screen protector off, immediately resolves the issue. So i know this proximity sensor must be out of whack.
Any way to re calibrate that bugger?

The glass is reflecting back. The proximity sensor should not be covered up.

To re-calibrate proximity sensor in LG G4.
This issue can be solved by re-calibration proximity sensor, you still can use screen protector with sensor covered up.
Mine is H815.
Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277634#*#" in phone dialer. Hidden Menu screen will show up.
2. Select "Device Test"->"MT", it will show "system will be restarted", then choose OK.
3. After reboot, GENESIS MiniOS 3.1 screen will show up, press "individual item+power" while power button is pressed.
4. Next, find "sensor test", enter it(do not block the proximity sensor), the proximity sensor will be automatically calibrated. Then block proximity sensor two times to exit.
5. Find "Back to the MainList", enter.
6. Press "Normal boot+power" while power butten is pressed to reboot system, done.
Now the problem should be solved.

Tried and waiting for results
I have tried the below steps.It seems fine for now.Will confirm after proper checking.
cym1124 said:
This issue can be solved by re-calibration proximity sensor, you still can use screen protector with sensor covered up.
Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277364#*#" in phone dialer. Hidden Menu screen will show up.
2. Select "Device Test"->"MT", it will show "system will be restarted", then choose OK.
3. After beboot, GENESIS MiniOS 3.1 screen will show up, press "individual item+power" while power button is pressed.
4. Next, find "sensor test", enter it(do not block the proximity sensor), the proximity sensor will auto be automatically calibrated. Then block proximity sensor two times to exit.
5. Find "Back to the MainList", enter.
6. Press "Normal boot+power" while power butten is pressed to reboot system, done.
Now the the problem should be solved.
Click to expand...
Click to collapse

cym1124 said:
This issue can be solved by re-calibration proximity sensor, you still can use screen protector with sensor covered up.
Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277364#*#" in phone dialer. Hidden Menu screen will show up.
2. Select "Device Test"->"MT", it will show "system will be restarted", then choose OK.
3. After beboot, GENESIS MiniOS 3.1 screen will show up, press "individual item+power" while power button is pressed.
4. Next, find "sensor test", enter it(do not block the proximity sensor), the proximity sensor will be automatically calibrated. Then block proximity sensor two times to exit.
5. Find "Back to the MainList", enter.
6. Press "Normal boot+power" while power butten is pressed to reboot system, done.
Now the the problem should be solved.
Click to expand...
Click to collapse
This worked like a charm. I had installed a new tempered glass protector and the problem started. But after this working fine! Thanks a ton

Do you know happen the code for Tmobile version?
I want to prevent the phone from turning off because of the proximity sensor completely.

Sorry for my typo
Sorry for my typo, “277364#*#” should be corrected as “277634#*#” to enter hidden menu.

cym1124 said:
Sorry for my typo, “277364#*#” should be corrected as “277634#*#” to enter hidden menu.
Click to expand...
Click to collapse
Thanks, I got to hidden menu but I don't see device test. Could be disabled by tmobile.

The proximity sensor uses infrared (IR). IR doesn't go through glass. So probably no way to fix it other than getting a glass cutter and removing that section of glass.

is there a way to do this on verizon model?

Spookymyo said:
The proximity sensor uses infrared (IR). IR doesn't go through glass. So probably no way to fix it other than getting a glass cutter and removing that section of glass.
Click to expand...
Click to collapse
The proximity sensor can be re-calibrated.
Dont forget the phone screen is also covered with glass.

I know it can be recalibrated. I've done it on mine. I was just referring to the glass screen protector. The normal screen is directly touching the proximity sensor the glass screen protector isn't. It's a problem that's been mentioned before with the glass screen protectors that don't have a cut out for the proximity sensor.

cym1124 said:
This issue can be solved by re-calibration proximity sensor, you still can use screen protector with sensor covered up.
Mine is H815.
Click to expand...
Click to collapse
Thanks man, re-calibration of proximity sensor solved the problem...kudos...I have the same model, problem started after putting tempered glass protector.

crisra said:
is there a way to do this on verizon model?
Click to expand...
Click to collapse
Enter the codes using the dialer. Use the Verizon Diagnostics code to get into the MiniOS.
Verizon Diagnostics
Uses: Various Sensor tests, GENESIS MiniOS,
##228378
Verizon Hidden Menu
##PROGRAMxxx where xxx would be 986 for the VS986 model.
Location and MMS Debug Menu
##DEBUG
Feature Enable/Disable Menu
##FEATURE
EDIT:
Realized I did not include the service code. If asked for one enter six zeros: 000000

I went to do the sensor test, however after entering it I got an error message which read along the lines of 'proximity calibration fail' and it wouldn't do anything from there, and I still have the same issues. Any ideas?

cym1124 said:
This issue can be solved by re-calibration proximity sensor, you still can use screen protector with sensor covered up.
Mine is H815.
Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277634#*#" in phone dialer. Hidden Menu screen will show up.
2. Select "Device Test"->"MT", it will show "system will be restarted", then choose OK.
3. After reboot, GENESIS MiniOS 3.1 screen will show up, press "individual item+power" while power button is pressed.
4. Next, find "sensor test", enter it(do not block the proximity sensor), the proximity sensor will be automatically calibrated. Then block proximity sensor two times to exit.
5. Find "Back to the MainList", enter.
6. Press "Normal boot+power" while power butten is pressed to reboot system, done.
Now the problem should be solved.
Click to expand...
Click to collapse
@cym1124 Pease add this code to your original post.
Just thought I would add a little to this thread since it is the first one that pops up during a google search and a LG representative just gave me instructions from it word for word. Even the typo (unless theres a typo in the manual or something).
I don't know why, but that code (277634) doesn't work on my phone. I think It may be an earlier beta or something.
Its att but it had an early software on it, 810 09e.
Here is the one that works. *#546368#*810# , I would assume that you could replace the 810 with whatever your model number is.
The code I found actually had 815 at the end.
I found this code at the bottom of the comments on a youtube video. So thanks to whoever that person is.
The second problem I had was I could not get into MT mode. Whenever it prompted me to restart, I chose ok and it did nothing.
Im not sure why it would work, but I just tried it about 5 times in a row finally (after 2 weeks of trying other soloutions) and it finally booted into genesis.
After that the normal instructions worked.
Side note. Apparently the software for 810 09e might not have its qfuse blown. meaning it could've been the only ATT phone g4 with an unlockable bootloader. But I thought that an update would fix my proximity issue. WORNG. well now we'll never know.
Anyways hope this helps someone out there. Even you LG tech reps.

Thank you @myphonesbetter, with your code, I was finally able to access the service menu. Sadly, everything but the first touch screen test option doesn't seem to be selectable.

coredump said:
Thank you @myphonesbetter, with your code, I was finally able to access the service menu. Sadly, everything but the first touch screen test option doesn't seem to be selectable.
Click to expand...
Click to collapse
Thought this might help..... press and hold the power button before selecting a option on screen.....

cym1124 said:
This issue can be solved by re-calibration proximity sensor, you still can use screen protector with sensor covered up.
Mine is H815.
Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277634#*#" in phone dialer. Hidden Menu screen will show up.
...
Click to expand...
Click to collapse
@cym1124
For me, to access the Hidden Service Menu I needed to use: *#546368#*815#*
Apparently for Taiwanese model.

issue not resolved
it is showing proximity cal fail after sensor test

Lock screen issue

I recently bought a new lg g4. Sometimes when i try to switch on my device using pattern lock or swipe unlock, the screen gets timed out automatically before i can finish the pattern. Can somebody please help me?

You are blocking your light sensor, either with one hand, or with a screen protector.

info
dont cover light/proximity sensor(upper part of phone).if issue not resolved then you need to recalibrate proximity sensor.

Thanks a lot people. Currently I have removed my tempered glass screen protection, that has solved the problem which I was facing. Can you suggest the best tempered glass screen protector for this phone, which is not covering the sensors. I am currently living in UAE.

chowdhuryrohan247 said:
Thanks a lot people. Currently I have removed my tempered glass screen protection, that has solved the problem which I was facing. Can you suggest the best tempered glass screen protector for this phone, which is not covering the sensors. I am currently living in UAE.
Click to expand...
Click to collapse
After applying any tempered glass, you need to recalibrate sensor.

sampathkumar2811 said:
After applying any tempered glass, you need to recalibrate sensor.
Click to expand...
Click to collapse
Can you please help me how to do it? So that I can use a tempered glass without having any issues with any sensors. Also I would like to inform you that my screen was going black while on call. Once I removed the tempered glass, this issue has been resolved as well.

o re-calibrate proximity sensor in LG G4.
This issue can be solved by re-calibration proximity sensor, you still can use screen protector with sensor covered up.
Mine is H815.
Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277634#*#" in phone dialer. Hidden Menu screen will show up.
2. Select "Device Test"->"MT", it will show "system will be restarted", then choose OK.
3. After reboot, GENESIS MiniOS 3.1 screen will show up, press "individual item+power" while power button is pressed.
4. Next, find "sensor test", enter it(do not block the proximity sensor), the proximity sensor will be automatically calibrated. Then block proximity sensor two times to exit.
5. Find "Back to the MainList", enter.
6. Press "Normal boot+power" while power butten is pressed to reboot system, done.
Now the problem should be solved.

sampathkumar2811 said:
o re-calibrate proximity sensor in LG G4.
This issue can be solved by re-calibration proximity sensor, you still can use screen protector with sensor covered up.
Mine is H815.
Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277634#*#" in phone dialer. Hidden Menu screen will show up.
2. Select "Device Test"->"MT", it will show "system will be restarted", then choose OK.
3. After reboot, GENESIS MiniOS 3.1 screen will show up, press "individual item+power" while power button is pressed.
4. Next, find "sensor test", enter it(do not block the proximity sensor), the proximity sensor will be automatically calibrated. Then block proximity sensor two times to exit.
5. Find "Back to the MainList", enter.
6. Press "Normal boot+power" while power butten is pressed to reboot system, done.
Now the problem should be solved.
Click to expand...
Click to collapse
Can you please tell me what could be causing the problem with the lockscreen issue that was posted before. Because once I removed the tempered glass, the lock screen issue and the screen going black while on call, both has been solved. Was it only that the proximity sensor was not working properly or was there any other sensors which was getting affected due to the tempered glass.

after applying tempered glass do the recalibrate as mentioned above.

Black screen lg g4

So, here is a situation: When the phone is locked and i try to unlock it, sometimes, the screen stay off even if it's working. To unlock the device i have to wait or i have to remove the battery.
The same thing occur when sensor prossimity it's on during the calling, and the screen come back to work when the call it's finished.
How can i resolve this problem?

Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277634#*#" in phone dialer. Hidden Menu screen will show up.*
2. Select "Device Test"->"MT", it will show "system will be restarted", then choose OK.*
3. After reboot, GENESIS MiniOS 3.1 screen will show up, press "individual item+power" while power button is pressed.*
4. Next, find "sensor test", enter it(do not block the proximity sensor), the proximity sensor will be automatically calibrated. Then block proximity sensor two times to exit.*
5. Find "Back to the MainList", enter.*
6. Press "Normal boot+power" while power butten is pressed to reboot system, done.
Now the problem should be solved.
---------- Post added at 08:34 PM ---------- Previous post was at 08:33 PM ----------
sampathkumar2811 said:
Follow steps below to re-calibrate proximity sensor(must with the glass protector is installed and which is sensor covered up)
1. TYPE "277634#*#" in phone dialer. Hidden Menu screen will show up.*
2. Select "Device Test"->"MT", it will show "system will be restarted", then choose OK.*
3. After reboot, GENESIS MiniOS 3.1 screen will show up, press "individual item+power" while power button is pressed.*
4. Next, find "sensor test", enter it(do not block the proximity sensor), the proximity sensor will be automatically calibrated. Then block proximity sensor two times to exit.*
5. Find "Back to the MainList", enter.*
6. Press "Normal boot+power" while power butten is pressed to reboot system, done.
Now the problem should be solved.
Click to expand...
Click to collapse
dialer code is *#546368#*815# for marshamallow

(FIXED) Bug at the bottom of the screen which mistakenly counts each touch twice

I use protective glass on the screen. The bottom of the screen is very sensitive, and mostly when I press a button on the bottom row of the keyboard, that character is repeated two or three times. Or if there is a button in that area, such as the Mute/Unmute button on the telegram pages, when I select the button, it's been selected and then return to the previous state, as if I pressed the button 2 times. I don't know if anyone has this problem? And whether this problem has something to do with the protective glass or not?

msi.1362 said:
I use protective glass on the screen. The bottom of the screen is very sensitive, and mostly when I press a button on the bottom row of the keyboard, that character is repeated two or three times. Or if there is a button in that area, such as the Mute/Unmute button on the telegram pages, when I select the button, it's been selected and then return to the previous state, as if I pressed the button 2 times. I don't know if anyone has this problem? And whether this problem has something to do with the protective glass or not?
Click to expand...
Click to collapse
Sounds like it's a issue with the protective glass, I also have a screen protector applied with LOCA glue & haven't experienced this issue

msi.1362 said:
I use protective glass on the screen. The bottom of the screen is very sensitive, and mostly when I press a button on the bottom row of the keyboard, that character is repeated two or three times. Or if there is a button in that area, such as the Mute/Unmute button on the telegram pages, when I select the button, it's been selected and then return to the previous state, as if I pressed the button 2 times. I don't know if anyone has this problem? And whether this problem has something to do with the protective glass or not?
Click to expand...
Click to collapse
Adjusted the bottom of the keyboard a little higher so it wont happen that's what fixed mine

wepa said:
Adjusted the bottom of the keyboard a little higher so it wont happen that's what fixed mine
Click to expand...
Click to collapse
Thanks, I already did it. But I want to see if this problem is caused by a hardware bug on the screen or just because of the use of a protection glass shield.

msi.1362 said:
Thanks, I already did it. But I want to see if this problem is caused by a hardware bug on the screen or just because of the use of a protection glass shield.
Click to expand...
Click to collapse
I have whitestone tempered glass on my phone now and it happened even before I had it on

wepa said:
I have whitestone tempered glass on my phone now and it happened even before I had it on
Click to expand...
Click to collapse
So should we conclude that as a hardware problem? Is it not possible to fix it by providing a software patch from Samsung?

I finally found the cause of the problem.
Settings > Accessibility > Hearing enhancements > Amplify ambient sound
When this option is turned on, the bottom of the screen mistakenly counts each touch twice.