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Knock On Not Working

68 posts
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By Anthony_xdl, Member on 30th April 2014, 05:27 AM
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18th April 2015, 03:05 PM |#71  
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Originally Posted by jadugur

this hidden menu code not working on cm12 :/ what should i have to do ? i have d800

try this app:
19th April 2015, 05:24 PM |#72  
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Originally Posted by ar31an

try this app:

Click image for larger version

Name:	Screenshot_2015-04-19-21-21-25.png
Views:	258
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ID:	3271024

Its shows this
19th April 2015, 11:45 PM |#73  
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Originally Posted by jadugur

Attachment 3271024

Its shows this

Touch on the 3 dots in top right corner, then select app explorer and then find hidden menu.

also have you tried this code: 3845#*800#
19th May 2015, 08:41 PM |#74  
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fixed knock on issue.. kinda
i know that there are other ways to fix the knock on problem.. I have an LG ms323 and I fixed the problem by changing my lock screen.. goto settings and change lock screen to "Swipe" and turn your screen off.. you should now be able to knock on the phone and at least choose to enable or disable knock on feature.. it wont be greyed out anymore..
19th June 2015, 03:45 PM |#75  
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Originally Posted by smirandaMEX

Hi Everyone,

I'm new to the site as registered user since I have been always for information but I will start sharing my experience with you all.

The one I have is a LS980 sprint model unlocked and running a RayGlobe Flex 3.5 custom rom, I bought it that way and since I bought it knock on feature will not work (Knock off does).
So after checking the setting on about phone/hardware information it shows model D802 so whoever install/unlocked the phone changed the device name.
So I used the *802# code for the hidden menu and it showed up.
In the Hidden Menu (thats the title that shows) select HW Device Test / Touch Test / Touch Firmware Upgrade (It will show to wait 10 sec to check version)
I also did the option in the main Hidden Menu / Settings / Update Touch Firmware it will freeze for about 5 sec while doing the update and then you can go back to home screen on your device and try it.

That worked for me .

Here's some hidden menu secret codes. You might want to double check your model number in the phone settings.

3845#*802# (for International model)
3845#*801# (for T-Mobile)
3845#*800# (for AT&T)
5689#*980# (for Sprint )
Dial: ##228378 + send (Verizon)
Other models, please use 3845#*YOUR-MODEL-NUMBER#

A second fix and more complicated one that I tried was to install custom rom CloudyG3 and it works just fine.

I had install cloudyG3 and upgrade the Touch Firmware but still cannot use knock on any idea?

---------- Post added at 10:45 PM ---------- Previous post was at 10:33 PM ----------

Originally Posted by Petbath

Hello to everyone,

after getting all this helpful info through this forum I've decided to contribute something myself.

I had the same issue after replacing my LG g2 screen. It worked fine before.
The problem in my case was the proximity sensor. It sits behind an oval window between the front facing camera and the light sensor. It has two small lenses, a bigger or the left and a smaller on the right.
If that sensor sits slightly wrong or the front rubber case is missing (I didn't noticed it the first time) or the required pressure from a small rubber behind (it is on the upper black secondary housing with the 7 screws) is not enough to hold it in a fixed certain place, it doesn't work correctly or at all.

When this happens the sensors detects near (meaning you have the device close to your face) and Knock unlocking is blocked. Also when you are making a call the screen goes off for the same reason, so it is easy to notice.

After I noticed and placed the front rubber case from the old screen, it was working, but slowly. It detected quickly the "near" position but it takes several seconds to re detect "far" position.

The final solution was reinforcing the small rectangular rubber which pushes the light sensor and the proximity sensor from behind, with two small pieces of sticker and the problem disappeared.

You can check that through the hidden menu (for my case 3845#*802#), HW Device test, ALC Proximity Test.
It should change rapidly from NEAR to FAR then waving your hand over the sensor.
If not, push firmly with one finger behind the sensor and see then if it is working

My proximity sensor cannot change rapidly from near to far when my hand over the sensor , any idea for fix it?
13th July 2015, 02:06 PM |#76  
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This worked thank you
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