How to disable KnockON (double tap to wake) on the LG G3 and other LG Android phones

How to disable KnockON (double tap to wake) on the LG G3 and other LG Android phones
No phone is perfect. From the basic feature phones to the smartphones of the highest caliber, they all have their flaws. The LG G3, while being one of the best phones we've reviewed in 2014, is no exception. You see, its maker has loaded it with a feature called KnockON, which allows one to wake or lock the phone with a double-tap on its screen. It's a feature that's both clever and convenient... most of the time.

But for some of us, KnockON does not work as flawlessly as it should. On rare occasions, the feature gets triggered accidentally while the phone is in a bag or pocket, which could lead to anything from battery drain to pocket dialing. One possible solution to the issue is to disable KnockON manually. Doing that, however, might not be a straight-forward procedure since the option to do so is not present in the settings menu of every LG G3 variant. In the phone's current software build, KnockON's switch may be placed in a hidden menu instead.

To disable the LG G3's double tap to wake function, you have to access the phone's service menu, which is done by inputting a code in its dialer app. The tricky part is that this secret code varies between LG G3 models. For example, the code is 3845#*855# on the international variant of the device (model D855), while the AT&T's model (D850) requires the code 3845#*850# entered. 

Regardless of which LG G3 model you have, try inputting 3845#*XXX# where XXX are the digits from your LG handset's model name. So if you have purchased your LG G3 from T-Mobile, you have to enter 3845#*851# as D851 is that particular variant's model name. 

Using the same formula, you should be able to access the service menu on other LG Android phones as well, as long as you know the model's name. Verizon's LG G3 is the only exception that we know of as it works with code ##228378 + send.

Once in the service menu, scroll down until you find "Knock on/off setting". In our case, it was the very last item on the list. Tap it and you'll be given access to the switch that disables KnockON. And that's it! If you ever feel like turning the double-tap-to-wake feature on again, just follow the same steps.  

More LG G3 tips and tricks:

Related phones

  • Display 5.5" 1440 x 2560 pixels
  • Camera 13 MP / 2.1 MP front
  • Processor Qualcomm Snapdragon 801, Quad-core, 2500 MHz
  • Storage 32GB + microSDXC
  • Battery 3000 mAh(21h 3G talk time)



1. minnonoman

Posts: 4; Member since: Feb 21, 2014

I have a on/off switch for knockON in gestures. LG G2 official lollipop

15. Gelyn

Posts: 1; Member since: Dec 05, 2015

mine was disabled..i want to enable it..i turned it on but when i go back 2 prev menu and check it back again sad to see it was still disabled.. :-) i cant change it..

2. bradsagi

Posts: 11; Member since: May 19, 2014

In my opinion, most of the people who buy LG phone because of it Knock On/ Knock Code feature. So why even bother to disable it, not to mention, in Phone Setting, there is a On/Off button for it..

16. jennyrodz29

Posts: 1; Member since: Jul 31, 2016

I have the LG G Stylo and the knock on/off feature disabled itself early today. How can I enable it back? I have been trying each and every single setting on my phone but can't find the on/off option.

3. kaikuheadhunterz

Posts: 1157; Member since: Jul 18, 2013

I think more people are interested in enabling KnockON on non-LG phones

4. apple4never

Posts: 1064; Member since: May 08, 2013

double tap to wake is sick why would anyone want to disable it

13. Pascoa

Posts: 1; Member since: May 14, 2015

i like it very much, but for instance i go to college everyday and i like to listen to music on my phone on my way... most of the times this feature interfears with the play and pause button. being that it semi unlock's your screen it wastes a lot of battery

5. DeusExCellula

Posts: 1390; Member since: Oct 05, 2014

Give me KnockON for my S4..

6. cncrim

Posts: 1590; Member since: Aug 15, 2011

Good info but knockon is awesome and should be standard on most android, why turn it off.

17. Apfire8

Posts: 1; Member since: Nov 01, 2016

The knock on feature sucks balls!!! Constantly getting turned on. If I cat it in my pocket, I text accidentally, call people, I even opened up my note pad app where I store all my passwords and added texts to all my passwords destroying I'll of my saved texts. It's horrible. I thought I would like it but it sucks. In the lg3 you can't turn it off either

7. hortizano

Posts: 294; Member since: May 22, 2013

And without KnockON the phone is STILL prone to accidental battery drain and pocket dialing (even more so)... so nobody is never satisfied with nothing. Fire all those engineers and designers.. their work is useless apparently..

8. Tvirus

Posts: 3; Member since: Jan 11, 2015

I have Tap to wake up on my Sony Xperia Z3.

9. joseg81

Posts: 204; Member since: Jul 15, 2011

the knock doesn't always work for me so i was hoping i could disable it. on my t-mobile version it doesn't have the option :(

10. Beaustir45

Posts: 29; Member since: Mar 26, 2012

I have a G2 and very very often I will have the phone turn on when I set it on a hard surface and sometimes on soft surfaces, because it thought that I tapped it on. I wish I could tweat the settings on it to stop that, but the feature is how I turn on my phone most of the time, so the trade off is worth it.

11. jessyi

Posts: 327; Member since: Jan 08, 2015

I love this feature..

12. Pattyface

Posts: 1658; Member since: Aug 20, 2014

I think every phone maker should have the knock feature. I believe Nokia has the most responsive version from my past experience

14. shinywindow unregistered

stupid feature, always turns itself on, and is aggravating more than useful, so yes, great to disable it to me. thank you for this great article!

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