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[TOT] Reset RCT (root check tool)

OP AriHell

20th August 2014, 08:24 PM   |  #1  
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Hey guys,
So I bought a new LG g3 32gb D855 few days ago and rooted it then few days later noticed that it somehow
has 2gb ram (1840mb) instead of 3gb as should be in 32gb version (BTW somebody else have this issue??)

Long story short because it was rooted device the warranty was not valid anymore so in order to unroot it
I download a suitable .KDZ file from
csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=[YOUR_IMEI]

and followed this guide(tnx hyelton!)
http://forum.xda-developers.com/show....php?t=2785089

I was able to successfully unrooting the device BUT in the LG hidden menu (3845#*855#)
in the LG RCT it was saying it was rooted (and had a date stamp)

I was looking all over for away to reset the RCT but without any luck and then I saw this thread (tnx somboons!)
http://forum.xda-developers.com/show....php?t=2715114

Where he was able to reset his RCT (ON A G2!) by editing the /persist/rct.cfg file and replacing the /persist/rct file
since I didn't had my original /persist/rct file I DIDN'T took the risk and didn't tried it.

Then I was lucky enough to run into this thread (tnx k0nane!)
http://forum.xda-developers.com/show...26&postcount=2

explaining exactly how LG's RCT is working

basically after reading it I understood that RCT flag our rom as rooted if it finds one or more of these files

Quote:

/system/[bin,sbin,xbin]/su
/sbin/su
/data/local/tmp/su
/system/app/[s,S]uper[u,U]ser.apk,
/data/data/com.noshufou.android.su
/data/local/tmp/[s,S]uper[u,U]ser.apk
/system/[bin,xbin]/busybox
/data/local/tmp/busybox

right after the first boot after reflashing your device (and then it also stamp that date in the rct.cfg)

Realizing that one of these files are still exist on the device the solution was to find and delete them!

my RCT display result was

Quote:

Rooted

Rooting related file had been installed.
>busybox

(soz don't have a screenshot)

So basically what I did is connecting my G3 to my PC and starting to search what and where are the exact files
causing my device to be flagged as"rooted"

I discovered that the only file that exists from the list above is
Quote:

/data/local/tmp/busybox

then I was able to delete it with the following command

Quote:

adb shell rm -r /data/local/tmp/busybox

after it was successfully deleted I reflashed the device again and WHOLA! it was fully unrooted!



As I was expecting at the first boot after reflashing it was unable to find any of the "root relating" files and because of that it didn't flagged it as "rooted".


Hope I could help someone
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21st August 2014, 12:13 AM   |  #2  
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Thank you very much for that, I didn't even know LG had such counter. Now, I am surprised you say your warranty was void after rooting your device. Do you know it for a fact, or is it an assumption ? I live in Europe, and unless proven otherwise any hardware related issue should be covered by the legal warranty (2 years here), unless LG thinks that your rooting of the device may have led to the issue, of course.
21st August 2014, 08:48 AM   |  #3  
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I just flashed a new rom and it showed not rooted. via LG flash tool.
21st August 2014, 10:08 AM   |  #4  
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Lucky u ☺ in my case some busybox files left in the system after reflashing 😕
21st August 2014, 10:47 AM   |  #5  
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When you were unrooting, did you use Normal or CSE flash?
21st August 2014, 10:55 AM   |  #6  
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Normal. I preferred to find a solution before trying CSE flash
21st August 2014, 01:58 PM   |  #7  
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good job.
thanks.
25th August 2014, 03:29 PM   |  #8  
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Edit: this was really helpful I'm unrooting my G3 when I get home so I can post it up for sale. Now time to root my F460
Last edited by Pilz; 25th August 2014 at 03:32 PM.
25th August 2014, 03:32 PM   |  #9  
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U can try the "restore" option in the lg pc suit
25th August 2014, 03:36 PM   |  #10  
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Quote:
Originally Posted by AriHell

U can try the "restore" option in the lg pc suit

I'll also give that a try, I'm not new to bricking my phone, but I'd rather avoid it if I can. It's usually a pain to fix, but I'd rather risk a brick and be able to root than have no root.

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