Is it safe to downgrade from NG2 to NAE? - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

I am now with the latest version NG2.
I want to flash Sac's custom ROM v6.
Is it safe to do that since i have knox tripped Bootloader?
And the android still version 4.4.2
Thanks for help.

Related

[Q] Downgrade G900FXXU1BNL9 (lollipop) to G900FXXU1ANG2 (kitkat)

Hello,
Downgrading G900FXXU1BNL9 (lollipop) to G900FXXU1ANG2 (kitkat) for my GS5 will trip knox to 0x1 or not?
Thanks
Fuz90 said:
Hello,
Downgrading G900FXXU1BNL9 (lollipop) to G900FXXU1ANG2 (kitkat) for my GS5 will trip knox to 0x1 or not?
Thanks
Click to expand...
Click to collapse
Hi. No,it will not trip your knox as it is Samsung Firmware. KNOX Gets tripped only when you root/CWM.
From what i heard which i forgot where, downgrading from 5.0 to lower WILL trip knox, because it then downgrades KNOX security, so samsung doesn't officially accept to downgrade it from 5.0 to 4.4. Also im 100% certain that Samsung wrote that it's not possible to downgrade from 5.0 to 4.4.x, so i assume if u force to downgrade, it may trigger the knox.
Sachitoge said:
From what i heard which i forgot where, downgrading from 5.0 to lower WILL trip knox, because it then downgrades KNOX security, so samsung doesn't officially accept to downgrade it from 5.0 to 4.4. Also im 100% certain that Samsung wrote that it's not possible to downgrade from 5.0 to 4.4.x, so i assume if u force to downgrade, it may trigger the knox.
Click to expand...
Click to collapse
I downgraded from polish lollipop bnl9 to kitkat(beacause I do not want to loose root) and my knox counter is still 0x0
Well thanks guys.
I did it also and it doesn't trip knox .
This ROM works in G900M?
Sent from my klte using XDA Free mobile app
Downgraded from lollipop G900IZTU1BOA1 to G900IDVU1ANK1 .
Lollipop is not yet for me. A bit laggy, not XPOSED framework and much other stuff which worked fine on KK. Must wait to 5.0.2 version maybe? Version 5.0 is not for advanced user yet
Total noooob downgrade:
1)Start phone in download mode
2)Flash KK firmware.
3)Your phone will not start normally either. Bootloop guaranted.
4)Remove battery and put in again.
5)Do a factory reset from STOCK recovery
6)Flash again KK firmware
7)Phone start normally, you can start customization and other stuff like rooting or daily using.

[Q] 4.4.2 bootloader which stock 4.4.2 firmwares can i downgrade to?

Sorry for the newbie question i am using samsung s4 from o2 uk and have their 4.4.2 version, i am unlocked now so can downgrade or upgrade to BTU unbranded 4.4.2 versions of which there appears to be 4 available in sammobile.
I understand that there is a new bootloader in 4.4.2 so am i able to upgrade /downgrade to any of the stock 4.4.2 firmwares without tripping knox or losing my imei?
I know to my annoyance that the new bootloader efs v2 in 4.1.2 xxemg4 for the samsung s3 prevented me to downgrade to any of the previous 4.1.2 stock roms due to this much to my annoyance as the battery life was superb on xxemc2 4.1.2 so i don't want to make the same mistake with 4.4.2, does anyonr know if there is another bootloader version in the latest 4.4.2 stock rom that may cause a similar issue?
Bear in mind i only want to be able to up down grade to any of the 4.4.2 that is available not go to 4.3 or up to 5.0 as far as you're aware are all versions of 4.4.2 BTU ok to flash in odin without issues?
no downgrade from kitkat
pete101 said:
Sorry for the newbie question i am using samsung s4 from o2 uk and have their 4.4.2 version, i am unlocked now so can downgrade or upgrade to BTU unbranded 4.4.2 versions of which there appears to be 4 available in sammobile.
I understand that there is a new bootloader in 4.4.2 so am i able to upgrade /downgrade to any of the stock 4.4.2 firmwares without tripping knox or losing my imei?
I know to my annoyance that the new bootloader efs v2 in 4.1.2 xxemg4 for the samsung s3 prevented me to downgrade to any of the previous 4.1.2 stock roms due to this much to my annoyance as the battery life was superb on xxemc2 4.1.2 so i don't want to make the same mistake with 4.4.2, does anyonr know if there is another bootloader version in the latest 4.4.2 stock rom that may cause a similar issue?
Bear in mind i only want to be able to up down grade to any of the 4.4.2 that is available not go to 4.3 or up to 5.0 as far as you're aware are all versions of 4.4.2 BTU ok to flash in odin without issues?
Click to expand...
Click to collapse
Sorry bud no way to downgrade from kitkat at this time, especially without tripping knox.
AndroidInitiate said:
Sorry bud no way to downgrade from kitkat at this time, especially without tripping knox.
Click to expand...
Click to collapse
I dont think you follow what I mean I dont want to downgrade from 4.4.2 per se I just want to use the other stock versions of 4.4.2 kitkat that have been released. Am I unable to downgrade from a higher version of kitkat to a lower previous version of kitkat that was avaialble a month before?
Same BTU stock version ie ugn9 down to ufn8 or something
pete101 said:
I dont think you follow what I mean I dont want to downgrade from 4.4.2 per se I just want to use the other stock versions of 4.4.2 kitkat that have been released. Am I unable to downgrade from a higher version of kitkat to a lower previous version of kitkat that was avaialble a month before?
Same BTU stock version ie ugn9 down to ufn8 or something
Click to expand...
Click to collapse
Yes as long as you are downloading the correct firmware for your phone based on model number you will be able to downgrade. Just use Odin and you should be set.
You can flash any 4.4.2. The different versions don't matter.
Are you 100% sure i can up or downgrade to any of the 4.4.2 versions?
I dont want to make a mistake like i did with my s3 whereby i updated to 4.1.2 xxemg4 the latest version of 4.1.2 available but had an efs v2 so was unable to downgrade to any of the 4.1.2 versions below it.
4.4.2 kikat has a new bootloader but they all have the same efs version right? Thanks for the help

Downgrade SM-N900W8 to 4.3 MJ1 from NA2 leaked Mexican ROM

Hello
So I have a Note 3 SM-N900W8 in Canada that came with Android 4.3 (MJ1 Telus) . Wanting to try 4.4.2 I waited until a method that allowed downgrades came out (The Mexican NA2 method)
So I updated to the 4.4.2 NA2 ROM and then to X-Note 4.4.2 (no idea of version, just remember it was X-Note 4.4.2 and I'm still on NA2 leaked bootloader.) After using it for about a year I want out and want to downgrade back to MJ1 4.3 due to instability. I have a copy of the 4.3 MJ1 tar.md5 on a external drive.
So just to make sure without getting a brick. I just insert the 4.3 MJ1 tar.md5 from SamMobile in Odin, go into Download Mode and it will downgrade to 4.3 including the bootloader? Just confirming.
Thanks
JTL

[HELP] NO sound & NO WIFI - S4 I9505 after flashing Stock 4.2.2 (downgrade Stock 5.0)

[HELP] NO sound & NO WIFI - S4 I9505 after flashing Stock 4.2.2 (downgrade Stock 5.0)
ISSUE: I have NO sound and NO WIFI after:
1) Upgraded to Stock 5.0.1. - did not like it THEN I;
2) Downgraded back to Stock 4.2.2
- AP: I9505XXUAMDE
- CP: I9505DVUAMD8
- CSC: I9505XSAAMD8
------------------
Odin Mode
product name: GT-i9505
Current Binary: Custom
System Status: Custom
Knox Kernel Lock: 0x0
Knox Warranty Void: 0x1
CSB-Config-LSB: 0x30
WRITE Protection: Enable
eMCC Burst Mode: Enabled
------------------
Don't why the above says Custom Binary when I flashed a stock ROM from sammobile
Please Help !!!
Downgrading from stock 5.01 to stock 4.2.2 could have tripped knox and set the screen to say custom.
So the bootloader and modem are now on 4.2.2?
audit13 said:
So the bootloader and modem are now on 4.2.2?
Click to expand...
Click to collapse
How do I tell / test ?
When I type *#1234# I get:
- AP: I9505XXUAMDE
- CP: I9505DVUAMD8
- CSC: I9505XSAAMD8
For the gt-i9505, I see no KK ROM, only 5.01 ROM: http://www.sammobile.com/firmwares/database/GT-I9505/
Where did you get the 4.2.2 ROM?
What do you see under settings, phone for baseband?
audit13 said:
For the gt-i9505, I see no KK ROM, only 5.01 ROM ....
Click to expand...
Click to collapse
Not sure what you mean re KK ROM ...
I9505 5.0.1 Stock ROM is available here: "sammobile.com/firmwares/download/48665/I9505XXUHOF2_I9505AMNHOF1_AMN/"
" 2015-11-17 - 5.0.1 - I9505XXUHOF2"
audit13 said:
Where did you get the 4.2.2 ROM?
Click to expand...
Click to collapse
4.2.2 Stock ROM from "sammobile.com/firmwares/download/14150/I9505XXUAMDE_I9505XSAAMD8_XSA/"
audit13 said:
What do you see under settings, phone for baseband?
Click to expand...
Click to collapse
From Phone: Baseband version: I9505DVUAMD8
KK = Kit Kat which is 4.4.2. My mistake because 4.2.2 is Jelly Bean.
I searched sammobile.com for the s4 gt-i9505 and only found firmware for the link in my post above. Following your link, I found the firmware.
As far as I know, Knox did not exist until the 4.3 firmware which leads me to believe that the bootloader on the phone is either 4.3, 4.4, or 5.01 while the modem is older than 4.3. This may be causing the problem. As a test. flash back to stock 5.01 to see if sound and wifi work.
audit13 said:
As far as I know, Knox did not exist until the 4.3 firmware which leads me to believe that the bootloader on the phone is either 4.3, 4.4, or 5.01 while the modem is older than 4.3. This may be causing the problem. As a test. flash back to stock 5.01 to see if sound and wifi work.
Click to expand...
Click to collapse
I flashed back to 5.0.1 and Sound & WiFi now works again - what does that mean ?
How do I then Flash back to a Stock 4.2.2 ROM and have Sound & WiFi work after that ?
If it works on 5.01, then at least you know everything is working properly and the problem is the 4.2.2 rom.
i don't believe you can downgrade the bootloader to stock 4.2.2 which means you cannot run a stock 4.2.2 rom on the phone because the phone will have a bootloader that is not compatible with 4.2.2.
audit13 said:
If it works on 5.01, then at least you know everything is working properly and the problem is the 4.2.2 rom.
Click to expand...
Click to collapse
Yes - Sound & WiFi work fine when I flash back to 5.0.1
audit13 said:
i don't believe you can downgrade the bootloader to stock 4.2.2 which means you cannot run a stock 4.2.2 rom on the phone because the phone will have a bootloader that is not compatible with 4.2.2.
Click to expand...
Click to collapse
WT ??? Does that mean if you upgrade to Stock 5.0.1 you can NEVER downgrade back to Stock 4.2.2 ??
Yes, it certainly looks that way. On my i337m, I can flash back to stock 4.4.2 but nothing older.
audit13 said:
Yes, it certainly looks that way. On my i337m, I can flash back to stock 4.4.2 but nothing older.
Click to expand...
Click to collapse
Google you s^#(k !! how dodgy is that not allowing people to downgrade if there upgrades are crap!!
Is there another way ??
Can I downgrade back to 4.2.2 with another Bootloader or custom ROM ??
Would surprised if I am the only one in the world that wanted to downgrade and there was no known workaround ...
It has nothing to do with Google as it is Samsung that locks the bootloader.
If a phone could fully downgrade to a stock 4.2.2 rom, including the bootloader, I would not expect to see any references to Knox in download mode.
You could search but I have not seen any posts where an end user was able to downgrade the bootloader to a non-Knox version.
audit13 said:
Yes, it certainly looks that way. On my i337m, I can flash back to stock 4.4.2 but nothing older.
Click to expand...
Click to collapse
When you downgraded from 5.0.1 to 4.4.2 did you get any Know Issues OR Loss of Sound OR Loss of WiFi ?
Does the downgrade need to be a stock ROM ?
Knox was tripped from 0x0 to 0x1 but everything worked, probably because the everything went to 4.4.2, including the bootloader.
The downgrade does not have to be a stock ROM. Running a 4.3 or 4.4.2 custom ROM such as CM does not alter the bootloader or modem.
audit13 said:
Knox was tripped from 0x0 to 0x1 but everything worked, probably because the everything went to 4.4.2, including the bootloader.
The downgrade does not have to be a stock ROM. Running a 4.3 or 4.4.2 custom ROM such as CM does not alter the bootloader or modem.
Click to expand...
Click to collapse
Does that mean I can downgrade from Stock 5.0.1 all the way down to Stock 4.3 with no issues except Knox tripped to 0x1 ?
Or does it have to be a customer ROM to have no issues ?
I have never used custom ROM's only Stock ROM's
Some bootloaders can be downgraded to 4.1.1 like I did with my note 2 but the s3 can't be downgraded at all. I think the s4 is limited to 4.4.2 .
Downgrade i9505 to 4.4.2
I downgraded my galaxy s4 i9505 from 5.0.1 to 4.4.2 and knox flag was not tripped.I think it will be tripped only if you flash bootloader without knox.Maybe if you don't care of knox flag and want to run android 4.2.2 you must flash kitkat modem to have working wifi..
Hello mr. Marduj5
I'm also a Galaxy S4 user and want to install stock 4.2.2. I did everything you said... but the only problem now is the microphone and the speakers don't work after flashing Kitkat modem. I had the Connections but the media is now the problem. Thanks for the help...

When will gt-I9505 having baseband #XXUGNH6 will get official lollipop firmware??

Today is the time of Marshmallow and I am still in kitkat. I dont mean I want marshmallow but atleast I am waiting for lollipop in my GT-I9505 of baseband #XXUGNH6.. I know there is several lollipop for baseband I9505XXUPOL1 but still #XXUGNH6 don't have.. And other thing I dont want lollipop from any other custom rom!
-Thank you!
Have you tried manually checking for the OTA?
You could also try flashing it with Odin. This will not trip knox or affect flash counter.
Are u sure?
Flashing stock firmware via Odin will not trip Knox unless you are trying to downgrade.

Categories

Resources