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Let's talk about bypassing Samsung screen lock with FRP:ON

Discussion of forensic issues related to all types of mobile phones and underlying technologies (GSM, GPRS, UMTS/3G, HSDPA, LTE, Bluetooth etc.)
Subforums: Mobile Telephone Case Law
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mshibo
Member
 

Let's talk about bypassing Samsung screen lock with FRP:ON

Post Posted: May 03, 18 13:40

So, I recently had that case (Samsung J105H, Pattern Lock, FRP: ON) the client needs the data from the phone.
So, I went to Google and surprisingly, I could easily find a very easy solution for it.
It's a modified (I believe) one-package firmware that after you flash via Odin everything will be as it was but with no lock screen at all.
Here is the topic for it: the-hellteam.com/2017/...%AF%D9%88/
So, we all know that you can't flash any modified images to the phone with FRP: ON since the bootloader will check the signature and then refuse those images. Now we want to understand this process more and see if it's applicable to more Samsung devices.  
 
  

UnallocatedClusters
Senior Member
 

Re: Let's talk about bypassing Samsung screen lock with FRP:

Post Posted: May 03, 18 13:57

Did you test the solution? What were the results?  
 
  

mshibo
Member
 

Re: Let's talk about bypassing Samsung screen lock with FRP:

Post Posted: May 03, 18 14:16

I tested it myself and it's 100% working. After flashing the firmware, I found no lock screen but there was like a side effect, the background was all black and I noticed some lag and FC msgs, but it isn't a problem since I could access the data on the phone which is the main purpose.  
 
  

mcman
Senior Member
 

Re: Let's talk about bypassing Samsung screen lock with FRP:

Post Posted: May 03, 18 14:40

Sounds like you flashed a trusted boot image to the device which is a pretty common method to bypass bootloader locked devices. The boot image is likely signed (aka trusted) by Samsung which allows the phone to recognize it as trusted avoiding the problem with regular recovery images which are not signed. If you do some digging around engineering boot images you should probably find a lot of info.

Jamie  
 
  

Thomass30
Senior Member
 

Re: Let's talk about bypassing Samsung screen lock with FRP:

Post Posted: May 03, 18 18:54

This topic is very interesting. I would love to get more info about it.

I have Samsung J5-SM-J510FN with pattern lock screen and FRP Lock On.
I cant flash TWRP because of that.  
 
  

passcodeunlock
Senior Member
 

Re: Let's talk about bypassing Samsung screen lock with FRP:

Post Posted: May 03, 18 19:11

Engineering boot images usually work, but it matters a lot if the sources for getting them are reliable or not.

In case of a "mistake" your data is gone, so I don't recommend this only to people who really know what they are doing!!!
_________________
Apple passcode unlock + decrypted filesystem dump, Android user locks unlock + physical dump with decrypted userdata partition. We provide our services world-wide, but we reserve the right for choosing which tasks we take and which we deny! 
 
  

mcman
Senior Member
 

Re: Let's talk about bypassing Samsung screen lock with FRP:

Post Posted: May 03, 18 19:30

- passcodeunlock
Engineering boot images usually work, but it matters a lot if the sources for getting them are reliable or not.

In case of a "mistake" your data is gone, so I don't recommend this only to people who really know what they are doing!!!


Agree completely, lots of questionable sources and not something I would just throw on a phone that is considered evidence before testing on another device.

Jamie  
 

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