I've got a Galaxy S3 I747 it is currently running 4.1.1, I747UCDLK3 Baseband. I'm not exactly a noob when it comes to flashing and rooting, I know my way around CWM and Odin pretty well. But I have a few questions on this 4.3 OTA. (I am a forum noob)
-Will I still be able to root? (I heard CF works for it)
-Can I install CWM? (Is the Bootloader locked??)
-Will I be be able to I flash other roms than the 4.3 TW like CM11Snapshot? (Is the bootloader locked?)
-What the h*ll is knox and why should I be worried?
-What is with the boot loader downgrading thing? (Have to do with locked bootloader??)
I AM NOT AT ALL WORRIED ABOUT A FLASH COUNTER OR VOIDING A WARRANTY I AM NOT ON A CONTRACT . I JUST DO NO WANT TO HARD BRICK MY PHONE.
If you take the OTA 4.3 update, it will install Knox and the 4.3 bootloader.
The 4.3 bootloader cannot be downgraded and attempts to do so will probably brick the phone.
You can root the stock 4.3 ROM with auto root but Knox may interfere with the process of cause issues after the fact.
You can still install CWM. I rrefer Philz Touch which is CWM-based.over TWRP.
So can I still flash roms?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Yes, you can flash ROMs. Is your phone unlocked? Since you're on 4.1.1 stock, you can unlock it for free.
Personally, I avoided the 4.3 update because it installs knox and the 4.3 bootloader which can cause problems when using Odin to get back to stock.
I have a Canadian version of the s3 and I'm able to run KK ROMs with a stock 4.1.2 bootloader.
audit13 said:
Yes, you can flash ROMs. Is your phone unlocked? Since you're on 4.1.1 stock, you can unlock it for free.
Personally, I avoided the 4.3 update because it installs knox and the 4.3 bootloader which can cause problems when using Odin to get back to stock.
I have a Canadian version of the s3 and I'm able to run KK ROMs with a stock 4.1.2 bootloader.
Click to expand...
Click to collapse
Unlocked as in Bootloader? Yeah I've been able to flash roms via CWM and Odin on 4.1.1 and as in Carrier unlocked? Yes I use Straight Talk on this ATT S3
If I got the 4.3OTA I wouldn't need Odin to go back stock if I flashed a ROM would I? I could just make a back up via CWM then restore later if I wanted right rather than using ODIN?
See I can't use KK roms because I have the 4.1.1 BL so is there a way I can upgrade my boot loader to the 4.1.2 version??
Would I lose my carrier unlock if I upgraded to 4.3 or if I upgrade my bootloader??
I suggest downloading a ROM you want to try, then unzip the ROM and look at the updater script to see which bootloaders are supported. The updater-script file is located in \META-INF\com\google\android\updater-script. You can use a text editor to open the updater-script file.
The first few lines will list the bootloaders that are supported. I run Validus which is a KK ROM using a stock 4.1.2 i747m bootloader.
Do you know about this > "If I got the 4.3OTA I wouldn't need Odin to go back stock if I flashed a ROM would I? I could just make a back up via CWM then restore later if I wanted right rather than using ODIN?"
Also couldn't I just upgrade my Bootloader and Modem from here?
http://forum.xda-developers.com/showthread.php?t=2321310
http://forum.xda-developers.com/showthread.php?t=1831898
I feel like if I upgrade my boot loader then I won't have to worry about restrictions.
Would I lose my carrier unlock if I upgraded to 4.3 or if I upgrade just my bootloader??
I ended up flashing the MG2 Modem and Bootloader, I'm good now, also if I want 4.3 I saw loserskater has a leak version that will be good and wont not let me downgrade my bootloader.
Related
I am thinking to flash a 4.4 ROM on my S3 I747M. The only thing I am worried about the bootloader. If I flash the latest boot loader can I downgrade it?
Here a scenario
I am on 4.4 kitkat,with the latest bootloader,and I decide to go back to 4.2.2 with the latest bootloader. Is it possible to do that?
xXFl4sh said:
I am thinking to flash a 4.4 ROM on my S3 I747M. The only thing I am worried about the bootloader. If I flash the latest boot loader can I downgrade it?
Here a scenario
I am on 4.4 kitkat,with the latest bootloader,and I decide to go back to 4.2.2 with the latest bootloader. Is it possible to do that?
Click to expand...
Click to collapse
What carrier do you use? If AT&T is it the MJB bootloader.
You can check what bootloader you having using this - https://play.google.com/store/apps/details?id=org.freeandroidtools.root_checker
If you are on AT&T with the MJB bootloader you CANNOT downgrade the bootloader. It will brick the phone. My guess is that you could possible run a 4.2.2 ROM with the MJB bootloader. I have run 4.3 and 4.4 on the MG2 bootloader with no problem but haven't tried to run a 4.2.2 on the MJB bootloader. As long as the 4.2.2 ROM doesn't flash a bootloader, I would try it. But that's me. Just back sure to have a current backup. If there are any doubts about the 4.2.2 ROM flashing a bootloader, don't do it if on MJB.
xXFl4sh said:
I am thinking to flash a 4.4 ROM on my S3 I747M. The only thing I am worried about the bootloader. If I flash the latest boot loader can I downgrade it?
Here a scenario
I am on 4.4 kitkat,with the latest bootloader,and I decide to go back to 4.2.2 with the latest bootloader. Is it possible to do that?
Click to expand...
Click to collapse
most 4.3 aosp roms can run on the mjb bootloader but you have to modify the updater script to include it. but what the post says above if you try to downgrade the bootloader from mj2 ATT then it will brick the device
I have the MVLDLK4 bootloader. The only thing I am worried about is that there might be a few errors while using the ROM. I have tried about 3-4 4.2.2 ROMS but there is always 1 or 2 errors eg. Wifi does not work. Since there is only a few roms on 4.4+, i am worried I wont get a stable rom with minor error.
Cause If I update and the rom has errors, I have no backup rom.
Is it possible to install a stock ROM once 4.3 and a locked bootloader is in place. I've looked all over and I seem to read conflicting stories. So...
I have a Samsung S3 Telus (AT&T) version running the latest 4.3 as of May1st, my bootloader is locked and I have a tripped flash counter.
If someone actually posts a I747MVLUEND2 rooted image can I flash it?
Can I flash an older version I747MVLUEM series?
Oh yeah my phone is NOT rooted.
Check post #5, 11, 27 here Guide: How I unlocked my ATT S3 [ 1 2 3 ... Last ]
Thread By: Jasonator
I think you didn't understand the question. You pointed me to a thread about unlocking.
With a 4.3 bootloader, you will need to install a custom recovery to flash ROMs. If you want to restore a stock 4.3 ROM, try this: http://forum.xda-developers.com/showthread.php?t=2658486
With a 4.3 bootloader, you cannot use Odin to flash a stock ROM unless that ROM was specifically compiled for flashing via Odin.
No this is not possible. I have a LOCKED boot loader. I can't flash a custom recovery as far as I know.
Also how would one know a ROM is made to be flashed by Odin even if it was possible? Maybe I missed something here.
I re-read your original post and I'm a bit confused. You have a Telus s3 (i747m) or AT&T s3 (i747)?
I have never heard of an s3 having a locked bootloader. All of the phones with a stock 4.3 ROM have a bootloader that cannot be downgraded.
audit13 said:
I re-read your original post and I'm a bit confused. You have a Telus s3 (i747m) or AT&T s3 (i747)?
I have never heard of an s3 having a locked bootloader. All of the phones with a stock 4.3 ROM have a bootloader that cannot be downgraded.
Click to expand...
Click to collapse
Sorry, I have a Telus I747M.
It seems all AT&T and Telus S3's have a locked boot loader after the upgrade to 4.3. This means you cannot flash CWM recovery to the phone anymore.
So, I beleive I can't fix it to put CWM recovery on but I may be able to flash a stock rom, I'm just not sure at this point what I can do. Based on your response it is not surprising I'm confused, there seems to be a LOT of conflicting information.
There are some stock ROMS that have already been rooted and I'm hoping I can flash one of those without bricking my phone.
horga_83 said:
Sorry, I have a Telus I747M.
It seems all AT&T and Telus S3's have a locked boot loader after the upgrade to 4.3. This means you cannot flash CWM recovery to the phone anymore.
So, I beleive I can't fix it to put CWM recovery on but I may be able to flash a stock rom, I'm just not sure at this point what I can do. Based on your response it is not surprising I'm confused, there seems to be a LOT of conflicting information.
There are some stock ROMS that have already been rooted and I'm hoping I can flash one of those without bricking my phone.
Click to expand...
Click to collapse
sir, the one who got the wrong idea is you
the only S3 with locked bootloader is the verizon version
i747/M doesn't regardless of which version
which occurs to me that you might have done something wrong trying to root your device
though i've never tried this tool to root but many people succeeded rooting their phone with this http://forum.xda-developers.com/showthread.php?t=1963790
so try it out
but again, you said to flash a stock rom... you can do it via Kies(is that how it is called? it had been so long since i last used it) or you can just use ODIN to flash it
Regardless of the subject of that thread, the posts I indicated directly speak to your 747m downgrade question.
Sent from my SAMSUNG-SGH-I747 using XDA Free mobile app
horga_83 said:
Sorry, I have a Telus I747M.
It seems all AT&T and Telus S3's have a locked boot loader after the upgrade to 4.3. This means you cannot flash CWM recovery to the phone anymore.
So, I beleive I can't fix it to put CWM recovery on but I may be able to flash a stock rom, I'm just not sure at this point what I can do. Based on your response it is not surprising I'm confused, there seems to be a LOT of conflicting information.
There are some stock ROMS that have already been rooted and I'm hoping I can flash one of those without bricking my phone.
Click to expand...
Click to collapse
Can understand why some may be confused about the question. If you have stock 4.3 already (which is the latest version available), why would you want to flash another stock ROM? If you are talking about flashing an older stock ROM, yes it is possible, and there have been several posts on how you can successfully downgrade the system only without altering the bootloader. Attempting to downgrade the bootloader will, of course, cause a brick so downgrading ROM only is a rather complicated process that should be attempted only if there is a very worthwhile reason for this. So far, there are very few arguments, if any, for downgrading from 4.3 to any older stock ROM version. If you are trying to flash a rooted version of the same stock, you need to be sure it's one with the same bootloader. You may, however, find it easier simply keeping the current system and rooting via Safe Root. You can, however, flash a custom ROM if it won't attempt to mess with your bootloader . As far as recovery goes, even if you have stock 4.3, you can still flash custom recovery via Odin or other prescribed installation route. I'm not aware of 4.3 preventing the flashing of a custom recovery. I have an AT&T i747 with stock 4.3 and I've flashed custom recovery several times.
pcshano said:
sir, the one who got the wrong idea is you
the only S3 with locked bootloader is the verizon version
i747/M doesn't regardless of which version
which occurs to me that you might have done something wrong trying to root your device
though i've never tried this tool to root but many people succeeded rooting their phone with this http://forum.xda-developers.com/showthread.php?t=1963790
so try it out
but again, you said to flash a stock rom... you can do it via Kies(is that how it is called? it had been so long since i last used it) or you can just use ODIN to flash it
Click to expand...
Click to collapse
So when my bootloader says Qualcomm secure boot = 1, that means what exactly?
I haven't tried to root my phone yet.
Well actually it's a stock ROM that has been rooted. As per this page:
http://forum.xda-developers.com/showthread.php?t=1739426&__utma=248941774.1179961654.1399404439.1400082744.1400099749.11&__utmb=248941774.1.10.1400099749&__utmc=248941774&__utmx=-&__utmz=248941774.1400099749.11.3.utmcsr=forum.xda-developers.com|utmccn=%28referral%29|utmcmd=referral|utmcct=/galaxy-s3-att/&__utmv=-&__utmk=261245838
horga_83 said:
So when my bootloader says Qualcomm secure boot = 1, that means what exactly?
I haven't tried to root my phone yet.
Well actually it's a stock ROM that has been rooted. As per this page:
http://forum.xda-developers.com/showthread.php?t=1739426&__utma=248941774.1179961654.1399404439.1400082744.1400099749.11&__utmb=248941774.1.10.1400099749&__utmc=248941774&__utmx=-&__utmz=248941774.1400099749.11.3.utmcsr=forum.xda-developers.com|utmccn=%28referral%29|utmcmd=referral|utmcct=/galaxy-s3-att/&__utmv=-&__utmk=261245838
Click to expand...
Click to collapse
I think that means secure booting has been enabled. Secure booting has nothing to do with having a locked bootloader. From what I have read in other forums, a locked bootload would not allow you to load a custom kernel.
Hey guys I am trying to update my galaxy s3 to kitkat. I am running galaxy s3 at&t variant 747 rooted 4.1.1. I747UCDLK3 update to kitkat. I realized I need to update to 4.1.2 first before doing the 4.3 update. I can't seems to find files I need for 4.1.2. Can someone point me in the right direction. Thank you for your help.
Are your running stock 4.1.1? If you are and your phone is not sim unlocked, unlock it using the free method. Once unlocked, use Odin to flash back to stock unrooted 4.1.1 and then run OTA until you get to KK. It's a longer process than trying to flash straight to 4.4 but is a safer method for people that are new to flashing ROMs.
I am on the stock rom 4.1.1. Does CWM recovery need to go back to stock as well? That is a good idea to unlock before I update.
If you flash back to stock 4.1.1 with Odin, it will wipe everything and put the phone back to completely unroot stock and stock recovery. Stock recovery and being unrooted is required for OTA updates.
Ok is this the link to unlock phone?
http://forum.xda-developers.com/showthread.php?t=2529200
Yes, that's it.
I can't seem to find 4.1.1 rom file links seem to be bad on unlock page.
There are stock rooted 4.1.1 images here: http://forum.xda-developers.com/showthread.php?t=1739426
You can use the free unlock method even if the ROM is rooted.
For some reason the at&t mirrors don't seem to be working either.
Mirror2 for the stock rooted 4.1.1 works for me.
I would like to root again after kit kat Is it easy to root with knox? Does unlock stick through kit kat? I really appreciate all of the help. Great website. Great people.
Many people have had success with rooting by using Towelroot.
The sim unlock is permanent.
Let me know how it goes for you @thepar. I expect to be updating to kitkat in the coming week.
For the benefit of those searching the forums to unlock their phones my experience may be of help to those on 4.1.2 or possibly even MJ2. I have had my SGS3 since June 2013 and only allowed one update, that was to 4.1.2. My phone was rooted long ago, but I just unlocked it earlier today and that was with a custom recovery in place and without unrooting. In my case I did not revert to the 4.1.1 rom. I did downgrade the modem to dlk3, that of 4.1.1 while leaving the rom and bootloader at MG2. After completing the unlock I upgraded the modem back to MG2. I have confirmed that SMS, MMS, phone, and wifi functionality is intact.
In truth, I will probably not go back to stock to get to kitkat. I am considering upgrading to the leaked MJ2/4.3 bootloader and MJB modem and then flash a kitkat rom which will work on them, there are several.
I just did the unlock yesterday. I need to find someone with a t-mobile sim to test if the unlock worked. Will I still be able to update the OS even though it is on rooted stock? What will it update me too?
I am kind of debating if I should install a custom rom minus KNOX.
thepar said:
I just did the unlock yesterday. I need to find someone with a t-mobile sim to test if the unlock worked. Will I still be able to update the OS even though it is on rooted stock? What will it update me too?
I am kind of debating if I should install a custom rom minus KNOX.
Click to expand...
Click to collapse
If you want to run an OTA update, you need stock recovery and an unrooted system.
I have a stock recovery but the os is rooted. I don't mind using oden to update the os. I might be better to install a rom with knox removed. I can't seem to find 4.1.1 stock unrooted. I did find 4.0.1 ICS.
You can find a stock ATT 4.1.1 ROM on sammobile.com.
You cannot use Odin to flash a stock KK ROM because it was never released in an Odin format by ATT. ATT provided the KK update via OTA updates. Complete KK updates were provided for i747m only.
Thanks so much!! downloading now.
Let us know what happens. Cheers
I have decided to go custom rom route. It is better to update stock ota first then install custom rom or custom rom straight from 4.1.1?
I have an AT&T SGH-i747 with bootloader I747UCDLK3, modem I747UCUEMJB and running CWM 6.0.3.8. I am planning on updating the bootloader to UCUFNE4. I have already unlocked the phone. Is there anything else I should do while my bootloader is still on UCDLK3 before I take the leap to UCUFNE4? Any suggestions and advice is appreciated. Thanks.
Did you carrier unlock your phone? If not, flash back to stock 4.1.1 using Odin, sim unlock using the free method, and run OTA updates until you get to the latest KK stock ROM. You can then install a custom recovery, flash supersu, disable know, and flash custom ROMs.
Hi there, just factory reset my i747 s3 att phone. i am on 4.1.2.
Should I root first with chainfire easily or should I update first? I dont even remember how to update this phone from stock. I would like to be at 4.4.2 or above (or are any of the newer versions good, 5/6 etc?) with root and xposed installed in the end. What should be next steps be?
thanks!
Moved to Q&A
If the phone is not sim unlocked, I would flash a stock 4.1.1 ROM from sammobile.com using Odin and use the free method to sim unlock. I would then run OTA updates until the phone is running the latest stock ROM. Running OTA updates is the slowest but easiest method to get the phone running the latest modem and bootloader. Many recent custom ROMs require the latest bootloader and modem to function.