Is it possible to relock the Bootloader on Samsung's Galaxy A71? - Samsung Galaxy A71 Guides, News, & Discussion

I have only experience of Rooting Google Phone actually. Now I have the first Samsung phone in my Hand that I want to root. But when I resell it, I want to lock the Bootloader again like I do with the original Google Phones. Is that possible with the A71 too?

XJSKFJHFKH23 said:
I have only experience of Rooting Google Phone actually. Now I have the first Samsung phone in my Hand that I want to root. But when I resell it, I want to lock the Bootloader again like I do with the original Google Phones. Is that possible with the A71 too?
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locking the bootloader is possible. but re-knox your phone isn't possible. once trippin will be tripped forever.

faizauthar12 said:
locking the bootloader is possible. but re-knox your phone isn't possible. once trippin will be tripped forever.
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Good to know that! So I need to read further before I begin to root. Thanks a lot for your quick response!
They use e-fuse which can only be turned from 0X0 to 0X1. That makes sense to me

Related

Question for devs regarding MK2 and Knox

Is anyone working currently working on a solution to this catastrophe? I'm one of the unfortunate individuals that happened to acquire an S4 with this build preinstalled. Needless to say, I'm pissed.I'm curious as to if it's even possible to bypass Knox. I'd love to liberate my Galaxy from Touch Wiz and install a the official GE ROM.
I'm more interested in the updated LTE modem that seems to be tied into the 4.3 knoxed up bootloader since I'm still on 4.2.2.
aka_word said:
Is anyone working currently working on a solution to this catastrophe? I'm one of the unfortunate individuals that happened to acquire an S4 with this build preinstalled. Needless to say, I'm pissed.I'm curious as to if it's even possible to bypass Knox. I'd love to liberate my Galaxy from Touch Wiz and install a the official GE ROM.
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Click to collapse
there is nothing to solve. you may install CWM/custom ROM as normal.
dcd1182 said:
there is nothing to solve. you may install CWM/custom ROM as normal.
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If you care about your warranty this may trip a counter "KNOX WARRANTY VOID 0X1" or something like that. But anyway, the part about voiding you warranty is a theory. In some cases I've read where a device was repaired in store with a simple re-flash of stock firmware, resetting the counter. Other cases have reported sending them in to either be fixed for free or sent a bill for tripping the counter. So the choice is your, just be informed of the concequences before you make your decision. This phone is damn near $700.
omnifarious said:
If you care about your warranty this may trip a counter "KNOX WARRANTY VOID 0X1" or something like that. But anyway, the part about voiding you warranty is a theory. In some cases I've read where a device was repaired in store with a simple re-flash of stock firmware, resetting the counter. Other cases have reported sending them in to either be fixed for free or sent a bill for tripping the counter. So the choice is your, just be informed of the concequences before you make your decision. This phone is damn near $700.
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Exactly. I don't know about anyone else, but I'd prefer to keep my warranty intact as well as the resell value. By the time I'm ready to sell it, I'm sure people will start caring about having the manufacturer's warranty still intact.
dcd1182 said:
there is nothing to solve. you may install CWM/custom ROM as normal.
Click to expand...
Click to collapse
The latest build prevents users from gaining root access.
What build ? CM?
My S4 Is Insane
DEVIANT DEVELOPMENT MEMBER
aka_word said:
The latest build prevents users from gaining root access.
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I was able to run CF-Autoroot after taking the update via Kies. I haven't installed Knox but I am on the MK2 bootloader. I don't believe it prevents root access...
aka_word said:
The latest build prevents users from gaining root access.
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totally irrelevant.
re: gaining root
aka_word said:
The latest build prevents users from gaining root access.
Click to expand...
Click to collapse
I just wonder where you read that rumor. LOL
You must be google'ing way too much!
Misterjunky said:
I just wonder where you read that rumor. LOL
You must be google'ing way too much!
Click to expand...
Click to collapse
This is drawn from my own experience.

[HOW TO][ROOT] T-MOBILE GS4 NB4 [KNOX 0x0]

ROOT [KNOX 0x0]
Did you update to NB4 and are on the verge of rooting but really do not want to trip that eFuse?
Well thanks to @geohot and his wonderful work of art over at: http://forum.xda-developers.com/showthread.php?t=2783157 we now have a
KNOX 0x0 root ability!
Step 1: Go to www.towelroot.com on your Galaxy S4 Device from T-Mobile and click the Logo in the middle (Lambda or upside down Y)
Step 2: Install the app (Google will try and halt you from installing just click next)
Step 3: Once App is installed tripple click on "Welcome to TowelRoot" Header.
Step 4: Once Text Box pops up enter the values "1337 0 1 7380 4 0" close keyboard and then press "Make it Ra1n"
There should be about a 10 Second wait and a dialog should pop up and say you are successfully rooted!
**Check your KNOX by going into download mode!
So shoot on over to his thread and give him a big thumbs up or even better... Donate!:good:
- I do not take any resposibility if your devices decides to melt in your hand like a hershey kiss on a 100 degree day nor if your late to work because your alarm clock stops working! Neither does geohot im sure. So beware you do this at your own risk.
Mine
Worked for me!!
Worked for me. Big thanks for modstring!
Dude....it's awesome to see @geohot again at work. He's an awesome guy with extreme skills. Good to see he moved away from video game console hacking to mobile phones. :victory:
If only there was a way to find a way to reverse the trip counter on already rooted phones.
brian117 said:
Dude....it's awesome to see @geohot again at work. He's an awesome guy with extreme skills. Good to see he moved away from video game console hacking to mobile phones. :victory:
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I first knew about him from jailbreaking iOS and unlocking the first iPhone, he was wasn't just into game console but it is good to see him with android, that dude is a beast!
serio22 said:
I first knew about him from jailbreaking iOS and unlocking the first iPhone, he was wasn't just into game console but it is good to see him with android, that dude is a beast!
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Yeah that too. He will always be known for jailbreaking iOS, and hacking the PS3 and getting "sued". He's had a crazy life . He even attempted working on hacking the Nintendo 3DS. But he might've moved away from that. All I know is, geohot is awesome and extremely knowledgable. Good to see him advancing with more technology.
Towelroot is awesome and all, but if you can find a way to flash recovery without tripping Knox let me know.
Does this work with the AT&T version of the S4?
Caferacer said:
Does this work with the AT&T version of the S4?
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It should
add another success! first time i tried towel root all it did was reboot my phone . this worked.! verified with root checker and Knox is 0x0 !
serio22 said:
It should
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Confirmed working for NB1 build brand new AT&T S4. The new build was giving me hassle since she just got her phone. Thanks!
wanted to see how far i could push it.
installed SU and let it disable Knox, ok , knox 0x0 still good booted n=into download mode and confirmed
installed rom manager and flashed clockwork knox 0x1 so don't flash any custom recovery. it will trip Knox.
hope that helps anyone who actually needs a knox to be 0x0. i didn't
merchant2112 said:
wanted to see how far i could push it.
installed SU and let it disable Knox, ok , knox 0x0 still good booted n=into download mode and confirmed
installed rom manager and flashed clockwork knox 0x1 so don't flash any custom recovery. it will trip Knox.
hope that helps anyone who actually needs a knox to be 0x0. i didn't
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Thank you guys it works!!
I'm just wondering though now that I have root, can I use some app to start removing bloatware from my phone safely? (Including KNOX, I'm talking about the app not the efuse) can I disable things like Carrier IQ without tripping the Knox fuse too now?
Thanks again! just trying to get an idea of what I can do without tripping the flag as I do want to have warranty on this guy for 6 more months. (last 2 replacements were defective and had to use warranty, still got 6 months left)
mansilla.jb said:
Thank you guys it works!!
I'm just wondering though now that I have root, can I use some app to start removing bloatware from my phone safely? (Including KNOX, I'm talking about the app not the efuse) can I disable things like Carrier IQ without tripping the Knox fuse too now?
Thanks again! just trying to get an idea of what I can do without tripping the flag as I do want to have warranty on this guy for 6 more months. (last 2 replacements were defective and had to use warranty, still got 6 months left)
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Km not sure about Carrier IQ, but you can't remove KNOX (it's at the system level, basically); but you can remove bloatware.
In regards to your warranty, as long as your device is bootable, you can get back to a stock state, with KNOX not tripped (there's various guides, though the S4 forums aren't the most organized, so it might take some digging).
Sent from my Galaxy S4 using XDA Free mobile app
Does this work on encrypted device?
Safe?
Hello Guys,
Works great and I did it on my device. But my Avast Antivirus detect it as a Trojan. It's ok if it had detected as a hack tool or something like that, but as a trojan.... That got me scary... So I went to virustotal.com and got same results from other AVs...
Is it a safe apk or it's just an false positive? What you guys have to say about that? My device is safe to sensitive information as Bank app, email, etc?
lsmmello said:
Hello Guys,
Works great and I did it on my device. But my Avast Antivirus detect it as a Trojan. It's ok if it had detected as a hack tool or something like that, but as a trojan.... That got me scary... So I went to virustotal.com and got same results from other AVs...
Is it a safe apk or it's just an false positive? What you guys have to say about that? My device is safe to sensitive information as Bank app, email, etc?
Click to expand...
Click to collapse
It's safe.. Look up what a trojan is.. I also accidently pressed the thanks button so you got a free one
Thanks!
serio22 said:
It's safe.. Look up what a trojan is.. I also accidently pressed the thanks button so you got a free one
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Click to collapse
So, thank you twice!
This did not work for me on NB4 - phone just reboots. Any suggestions?

[Q] Just got the GTP 8.4. What to do with all this bloatcr*p?

Hey guys. So I just got a Samsung galaxy tab pro 8.4 and it's full of crap. I also read that installing a new rom will mess your warranty right? Will rooting it also mess it?
ValdoNunes said:
Hey guys. So I just got a Samsung galaxy tab pro 8.4 and it's full of crap. I also read that installing a new rom will mess your warranty right? Will rooting it also mess it?
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yes both rooting and flashing puts an end to your warranty
the first thing you can do which will make quite a difference is go to settings / general /application manager and tap on each one of Samsung's bloats - there must be more than 30- and see which ones can be disabled. they are quite plenty. disable them you will end up with a much lighter touchwiz
it is totally harmless and needs no rooting.
off course after rooting you can freeze all of them but first things first
oh and enjoy your tab!
Sent from my SM-T320 using XDA Free mobile app
Thanks!
I already deactivated some of them, but I'm a bit afraid of deactivating something I shouldn't. Is there a list of what I can deactivate?
I also installed nova launcher and the same icon pack I use on my phone.
EDIT: also, how do you add/remove widgets on the lockscreen?
It will definitely not remove the hardware warranty...
rchtk said:
It will definitely not remove the hardware warranty...
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Click to collapse
wut? the rooting or installing new rom?
Why not install towel root (depending on what firmware you have) then su pro and then install titanium backup and remove or freeze the bloat Ware. If anything goes wrong just reflash the original firmware for your region and all is good again. That's exactly what I have done mate and it didn't trip knox either.
The problem is that I heard that it eliminates all warranty..
ValdoNunes said:
The problem is that I heard that it eliminates all warranty..
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Towel root does not trip knox.
Cheers,
Rich
Sent from my SCH-I535 using Tapatalk
Really? I thought there was no way to do it.
ValdoNunes said:
wut? the rooting or installing new rom?
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Click to collapse
Both. You'll find nothing that states this nor I the contract you so signed or on Samsungknox website. That's a myth.
And even if it was this wouldn't apply in Europe or in the US..
Was is removed is Knox warranty. Meaning that the device has been tampered with.
rchtk said:
Both. You'll find nothing that states this nor I the contract you so signed or on Samsungknox website. That's a myth.
And even if it was this wouldn't apply in Europe or in the US..
Was is removed is Knox warranty. Meaning that the device has been tampered with.
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Click to collapse
So what is even the Knox warranty? You're telling me that it will be known that the device has been tampered with, but i can still send it to warranty and get assisted ?
ValdoNunes said:
So what is even the Knox warranty? You're telling me that it will be known that the device has been tampered with, but i can still send it to warranty and get assisted ?
Click to expand...
Click to collapse
Knox is like secureboot with PC it creates a chain of trust from bootloader up to ROM. If anything of this chain is modified Samsung will not feel responsible for any software related bugs or software security concerns.
Hardware warranty is lost only if the manufacturer can prove that your software modification resulted in damage. Over clocking or playing wih thermal threshold are such cases. Rooting or flashing is not..
rchtk said:
Knox is like secureboot with PC it creates a chain of trust from bootloader up to ROM. If anything of this chain is modified Samsung will not feel responsible for any software related bugs or software security concerns.
Hardware warranty is lost only if the manufacturer can prove that your software modification resulted in damage. Over clocking or playing wih thermal threshold are such cases. Rooting or flashing is not..
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Oh. Greatly explained. Thanks!
rchtk said:
Rooting or flashing is not..
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Click to collapse
I could confirm that:
Towel root does not trigger any visual flags
Flashing a ROM (like CM11) does trigger "Kox Warranty Void" flag but not "Knox" flag.
So if one likes to play safe from ServiceCenter point of view, rooting is a bit safer option...
can't you temp root it?
then you can remove the bloatware and when you restart, you are not rooted!

Tamper flag and Android Pay

Hi all,
Just got a OP3 and was thinking about unlocking the bootloader. Having read OnePlus' policy on warranty and root, there should be no problem.
However, I have read about the "Tampered flag" that is set when unlocking the bootloader and which doesn't get reset even after relocking it. Could this affect my ability to run Android Pay or any other similarly secure software? I've read that Knox will start doing that, so better to be safe than sorry
Thanks!
You can use Android Pay with an unlocked bootloader fine even when you've re-locked it. it'd just root that will stop Android Pay from working.
Roxas598 said:
You can use Android Pay with an unlocked bootloader fine even when you've re-locked it. it'd just root that will stop Android Pay from working.
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Click to collapse
Thank you!
I guess there's no way to reset the tampered flag?
vagaerg said:
Thank you!
I guess there's no way to reset the tampered flag?
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Click to collapse
I don't think there even is one, if there is i've never noticed it or it causing issues to anything.
Roxas598 said:
I don't think there even is one, if there is i've never noticed it or it causing issues to anything.
Click to expand...
Click to collapse
Awesome. Thanks a lot again!

Re-Lock Bootloader?

So a little while ago i tried to root my S9, it did not go well so i flashed stock firmware in Odin and everything started working fine again.
Yesterday my bank finally started supporting Google pay so i went to add my card but it said i was still rooted. After some searching i found out the my CTS Profile Match was failing because i unlocked the bootloader, is there anyway to relock the bootloader to pass safetynet?
on developer options you can disable bootloader unlock but its gonna factory reset your device.
dimitrispas22 said:
on developer options you can disable bootloader unlock but its gonna factory reset your device.
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ok, are you sure that it will work. I have heard some theorys that once you trip Knox you can't relock the bootloader
thewoolysheep08 said:
ok, are you sure that it will work. I have heard some theorys that once you trip Knox you can't relock the bootloader
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Click to collapse
that knox how much i HATE it....
anyway i have the same device and i did that...
your knox is already 0x1 samsung pay and some other features for example s health you can not access it anymore via the original apk and firmware if you don't have root..
google pay will work just fine after you gonna lock the bootloader.
and if you want to use gpay with custom rom you must delete google play services and install a version that starts from 14. something and hide magisk but it works just fine
aparently
dimitrispas22 said:
that knox how much i HATE it....
anyway i have the same device and i did that...
your knox is already 0x1 samsung pay and some other features for example s health you can not access it anymore via the original apk and firmware if you don't have root..
google pay will work just fine after you gonna lock the bootloader.
and if you want to use gpay with custom rom you must delete google play services and install a version that starts from 14. something and hide magisk but it works just fine
aparently
Click to expand...
Click to collapse
I don't really care about the Samsung pay and that stuff. but will locking the bootloader even work with Knox tripped? all I want to do is pass safetynet
thewoolysheep08 said:
I don't really care about the Samsung pay and that stuff. but will locking the bootloader even work with Knox tripped? all I want to do is pass safetynet
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Click to collapse
after locking the bootloader you gonna pass safetynet yes
dimitrispas22 said:
after locking the bootloader you gonna pass safetynet yes
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Click to collapse
yeah I know that, but doesn't having Knox tripped make it unable to lock? have you done this exact thing before?
thewoolysheep08 said:
I don't really care about the Samsung pay and that stuff. but will locking the bootloader even work with Knox tripped? all I want to do is pass safetynet
Click to expand...
Click to collapse
https://photos.app.goo.gl/FVWPKofhji5EQKvq7
dont worry this is a google photo link which contains a proof that gpay works when you gonna lock the bootloader..
you can use smart switch to backup your data
dimitrispas22 said:
https://photos.app.goo.gl/FVWPKofhji5EQKvq7
dont worry this is a google photo link which contains a proof that gpay works when you gonna lock the bootloader..
you can use smart switch to backup your data
Click to expand...
Click to collapse
have you done this exact same thing before?
thewoolysheep08 said:
have you done this exact same thing before?
Click to expand...
Click to collapse
yes
dimitrispas22 said:
yes
Click to expand...
Click to collapse
alright, thanks so much for your help. I'll try this tomorrow and let you know how it went
dimitrispas22 said:
yes
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Click to collapse
ok, thanks so much for your help. I'll try it tomorrow and let you know how it goes
dimitrispas22 said:
yes
Click to expand...
Click to collapse
Thanks so much for your help, just did it today and it worked great!
I have a custom rom. If I block the bootloader, can I have google play certified?
I've a Samsung Galaxy S9 Plus

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