I know there are a few threads regarding this issue but I can't seem to find a definitive answer.
I am currently running stock 4.3 jellybean (rooted). My phone hasn't received the 4.4 KitKat update yet, so I wanted to install CM11 in order to get KitKat on my s3. However, I heard CM11 can be buggy on the s3, so in case things go south, I want to be able to revert back to the stock 4.3 rom. Some people have said that you can easily flash the stock ROM via ODIN. However, others said that downgrading from 4.4.2 to 4.3 will hard brick the device since installing CM11 updates the boot loader. So downgrading to 4.3 stock with a 4.4.2 boot loader will cause a hard brick according to other threads I've seen. My question is, how can I downgrade from CM11 to stock 4.3 safely without bricking? Thanks in advance.
If you are sure you are using a Canadian version of the i747m, you can flash back to stock in Odin using a stock 4.3 ROM for the phone's original carrier (Bell, Rogers, Telus).
audit13 said:
If you are sure you are using a Canadian version of the i747m, you can flash back to stock in Odin using a stock 4.3 ROM for the phone's original carrier (Bell, Rogers, Telus).
Click to expand...
Click to collapse
Yes I got the phone from Rogers, it's most definitely i747M. But do I have to worry about any issues with the bootloader? I'm assuming installing CM11 will install the 4.4.2 bootloader, so if I choose to downgrade to the stock 4.3 rom, will it cause any issues seeing as I'm running a 4.3 rom with a 4.4.2 bootloader? I just want to make sure because I heard it can cause some serious problems if the bootloader is newer than the rom.
Mzrz said:
Yes I got the phone from Rogers, it's most definitely i747M. But do I have to worry about any issues with the bootloader? I'm assuming installing CM11 will install the 4.4.2 bootloader, so if I choose to downgrade to the stock 4.3 rom, will it cause any issues seeing as I'm running a 4.3 rom with a 4.4.2 bootloader? I just want to make sure because I heard it can cause some serious problems if the bootloader is newer than the rom.
Click to expand...
Click to collapse
I have never come across a custom ROM that touches the bootloader. A compatible bootloader has to be loaded on the phone before you attempt to install the custom ROM. Supported bootloaders can be found in the ROM's updater script.
I assume your phone has no warranty since you rooted it on stock 4.3. Did you root it by installing a pre-rooted ROM?
You could copy a ROM to your external SD card, install Philz Touch via Odin, reboot directly to recovery, create a nandroid backup, wipe cache, Dalvik, data, and install your KK ROM.
audit13 said:
I have never come across a custom ROM that touches the bootloader. A compatible bootloader has to be loaded on the phone before you attempt to install the custom ROM. Supported bootloaders can be found in the ROM's updater script.
I assume your phone has no warranty since you rooted it on stock 4.3. Did you root it by installing a pre-rooted ROM?
You could copy a ROM to your external SD card, install Philz Touch via Odin, reboot directly to recovery, create a nandroid backup, wipe cache, Dalvik, data, and install your KK ROM.
Click to expand...
Click to collapse
Okay, I was just making sure because I know OTA updates can change the bootloader, so I just wanted to make sure the custom roms don't do that. As for the custom recovery, are you recommending Philz Touch over CWM and TWRP? Do you know which custom recovery is installed from the CM installer?
audit13 said:
I have never come across a custom ROM that touches the bootloader. A compatible bootloader has to be loaded on the phone before you attempt to install the custom ROM. Supported bootloaders can be found in the ROM's updater script.
I assume your phone has no warranty since you rooted it on stock 4.3. Did you root it by installing a pre-rooted ROM?
You could copy a ROM to your external SD card, install Philz Touch via Odin, reboot directly to recovery, create a nandroid backup, wipe cache, Dalvik, data, and install your KK ROM.
Click to expand...
Click to collapse
Oh and one more question, my phone was originally carrier locked to Rogers and unrooted on 4.3 jelly bean. I brought it in to a cell store for them to carrier unlock it for me, but they used a rooting method to unlock it (because SuperSU was installed on it when I brought it back). They didn't unlock it with a code, so I'm guessing they used something like Samsung Tool or z3x shell. If I install CM11, will I lose the unlock, considering it's more of a "soft unlock", or is the unlock permanent regardless of how many roms I flash? Thanks for your help!
Mzrz said:
Okay, I was just making sure because I know OTA updates can change the bootloader, so I just wanted to make sure the custom roms don't do that. As for the custom recovery, are you recommending Philz Touch over CWM and TWRP? Do you know which custom recovery is installed from the CM installer?
Click to expand...
Click to collapse
Philz is based on the latest release of CWM and I prefer CWM over TWRP because I had problems flashing ROMs. Once I switched to Philz/CWM, no more problems.
Mzrz said:
Oh and one more question, my phone was originally carrier locked to Rogers and unrooted on 4.3 jelly bean. I brought it in to a cell store for them to carrier unlock it for me, but they used a rooting method to unlock it (because SuperSU was installed on it when I brought it back). They didn't unlock it with a code, so I'm guessing they used something like Samsung Tool or z3x shell. If I install CM11, will I lose the unlock, considering it's more of a "soft unlock", or is the unlock permanent regardless of how many roms I flash? Thanks for your help!
Click to expand...
Click to collapse
The unlock should be permanent. I unlocked it using the free method when on 4.1.1 and no ROM has ever caused it to re-lock. Reflashing a completely stock ROM, including the bootloader, did not relock the phone.
Please remember that flashing and changing ROMs will always carry a risk of soft bricking or hard bricking your phone. Make sure you read all of the guides and be prepared for disaster.
Good read here: http://forum.xda-developers.com/showthread.php?t=2201860
Related
Hey all,
I'm looking for an extended reboot menu thats flashable for the new 4.3 update thats been rolling out. I'm on Telus (Canadian carrier) stock rom NOT rooted but with custom recovery. (Can't root due to work restrictions). Does anyone know of one or if the ones for ex the GS3 would work?
Thanks!
If you are not Rooted but with a custom recovery you flashed an unlocked bootloader correct?
As far as I know the 4.3 update for I317m bootloader has not yet been unlocked. I think if you accept the update to stock 4.3 you would lose your custom recovery until the unlocked 4.3 bootloader has been cracked. I don't think you would be able to flash any mods at that point.
Don't quote me.
SpikeDrums said:
If you are not Rooted but with a custom recovery you flashed an unlocked bootloader correct?
As far as I know the 4.3 update for I317m bootloader has not yet been unlocked. I think if you accept the update to stock 4.3 you would lose your custom recovery until the unlocked 4.3 bootloader has been cracked. I don't think you would be able to flash any mods at that point.
Don't quote me.
Click to expand...
Click to collapse
A bit of background information on my set up.
Previosuly I was unlocked, rooted and custom rom on 4.1. Then my work began no longer allowing rooted phones to receive company email so in SuperSU I clicked "unroot" and kept the custom recovery and custom rom with all the tweaks but lost root access. Then my phone got messed up somehow so I decided to wipe it and install a new rom as it had been a few months. I installed a 4.3 rom and proceeded to unroot it. Apparently in 4.3 something has changed and simply clicking unroot removed my root access but the company program (Good for Enterprise) could still detect that it had been rooted. So I grabbed the Telus stock 4.3 firmware from a mirror (Sammobile still doesn't have it due to hotfile being shut down) and flashed it through Odin. This put me back to stock recovery and stock firmware, not rooted. I then flashed TWRP over the stock recovery in Odin and here we now are. I can confirm that the recovery flash did take and I am able to get into it, etc. Just looking for some .zips to flash now to bring things back to a custom rom state minus the root.
I think your stuck until some one comes out with a stock deodexed version as the reboot options are in the androidpolicy.jar file . Skynote 10 is based on the latest Canadian 4.3 and has the reboot option., just pull your csc folder and put it in the zip before flashing. But it is rooted and not sure if you can use cf-root to unroot as i have never tried to unroot you could also use xposed and wanam but you will need root for them to work hope i didn't confuse you
Hi im new on this forum and I would like to have some tricks and tips cause I just rooted my phone yesterday and it seems more difficult to find information for my phone I have a galaxy s3 on 4.3 sgh i747m with Rogers .... Is it me or there is just a lot more stuff made for the i9300... I have tried to find ROM'S and tricks to put CWM recovery but it's harder to find information !!
to put CWM recovery I saw a lot of stuff saying download rom manager and install CWM recovery with this app but they offer me a version of CWM recovery for a galaxy s3 (metro cps) they doesn't say if it's made for a sgh i747 so im really scared to do something wrong if I install this version of CWM recovery ..
Could some one help me maybe with website limks or a guide for beginers noob like me or this forum seem's to be really good with some people with knowledge
Before my galaxy s3 I had a Jailbreak Iphone 3gs a year ago but Rooting an Android and putting stuff on it is not really the same thing it's far away from it!
And does it matter if put some stuff on my phone made for at&t sprint etc.... even if those are sgh i747
Hey,
I am running CM11 d2att and CWM d2att on my i747m and it works perfectly. It has been so long since I did it that I can't remember the exact steps that I took, so I would do some more research. Everything I needed to know was on these forums somewhere.
I believe the rough steps I took were:
- Root
- Install CWM (d2att)
- Update bootloaders (i747m)
- Flash d2att rom
But I can't remember exactly, so do some research before you go ahead!
You can install pretty much whatever you'll find in these forums except for bootloaders and modems.
There are specific bootloaders/modem for the i747m vs. i747.
The rest, unless explicitely specified otherwise, is 100% compatible between i747 and i747m.
As for your recovery script, I would suggest installing TWRP instead of CWM.
TWRP is more user friendly for people that are new to Android and both are usually supported.
For this, go to the Play Store, download and install the "Goo manager" application.
Once installed, open up the app, hit the menu button and select the "install recovery script" option.
It will automatically select/download/install the correct recovery for your phone and ask you to confirm before doing so.
HiKsFiles said:
You can install pretty much whatever you'll find in these forums except for bootloaders and modems.
There are specific bootloaders/modem for the i747m vs. i747.
The rest, unless explicitely specified otherwise, is 100% compatible between i747 and i747m.
As for your recovery script, I would suggest installing TWRP instead of CWM.
TWRP is more user friendly for people that are new to Android and both are usually supported.
For this, go to the Play Store, download and install the "Goo manager" application.
Once installed, open up the app, hit the menu button and select the "install recovery script" option.
It will automatically select/download/install the correct recovery for your phone and ask you to confirm before doing so.
Click to expand...
Click to collapse
Ok thank you thats what I was wondering it doesn't matter if it's an at&t, bell or rogers... but it have to be the right model !!
Your talking about bootloader ... when I rooted my phone I have unlock my bootloader right ?? What is the advantage of changing your bootloader ....do you have to change it when you put a custom rom's?? Maybe my question have no sense at all because im new to this but I keep reading a lot of stuff on android !
carlosQC said:
Ok thank you thats what I was wondering it doesn't matter if it's an at&t, bell or rogers... but it have to be the right model !!
Your talking about bootloader ... when I rooted my phone I have unlock my bootloader right ?? What is the advantage of changing your bootloader ....do you have to change it when you put a custom rom's?? Maybe my question have no sense at all because im new to this but I keep reading a lot of stuff on android !
Click to expand...
Click to collapse
I recommend not updating your phone to any stock 4.3 ROM. A stock 4.3 ROM will install a 4.3 bootloader which cannot be downgraded and may cause problems when trying to root or get back to stock.
Some newer ROMs require an updated bootloader in order to install and boot. I am running a 4.1.2 bootloader on my i747m and don't have any problems installing 4.4.2 ROMs.
Rooting gives you access to the system files and does not unlock you bootloader.
For installing custom ROMs, I use Philz Touch which is based on CWM. I have tried TWRP and I was getting errors when flashing custom ROMs. I was able to flash the same ROM using Philz Touch without a problem. TWRP is more user friendly but doesn't work as well for me.
audit13 said:
I recommend not updating your phone to any stock 4.3 ROM. A stock 4.3 ROM will install a 4.3 bootloader which cannot be downgraded and may cause problems when trying to root or get back to stock.
Some newer ROMs require an updated bootloader in order to install and boot. I am running a 4.1.2 bootloader on my i747m and don't have any problems installing 4.4.2 ROMs.
Rooting gives you access to the system files and does not unlock you bootloader.
For installing custom ROMs, I use Philz Touch which is based on CWM. I have tried TWRP and I was getting errors when flashing custom ROMs. I was able to flash the same ROM using Philz Touch without a problem. TWRP is more user friendly but doesn't work as well for me.
Click to expand...
Click to collapse
what do you mean when you say I recommend not updating your phone to any stock 4.3 ROM (when a custom rom is based on 4.3?) and can you explain me the bootloader thing in details how can I fix that or how can I unlock it ?
what is d2att ?
carlosQC said:
what do you mean when you say I recommend not updating your phone to any stock 4.3 ROM (when a custom rom is based on 4.3?) and can you explain me the bootloader thing in details how can I fix that or how can I unlock it ?
what is d2att ?
Click to expand...
Click to collapse
Your post says youhave 4.3 on your phone. Is it a stock 4.3 ROM?
d2att (i747) is the AT&T version of the s3. Canada has the i747m.
The bootloader does not need to be unlocked in order to install a custom recovery or to root like Motorola phones.
The bootloader is software that an OS works with in order to function as a phone.
audit13 said:
Your post says youhave 4.3 on your phone. Is it a stock 4.3 ROM?
d2att (i747) is the AT&T version of the s3. Canada has the i747m.
The bootloader does not need to be unlocked in order to install a custom recovery or to root like Motorola phones.
The bootloader is software that an OS works with in order to function as a phone.
Click to expand...
Click to collapse
yes its the 4.3 jelly bean stock rom
but can I put any custom rom for my model the i747 or 747m ? The carrier doesn't have any importance ?
Any warranty left on your phone? Installing a custom ROM will void your warranty.
If you want to install a custom rom, copy the ROM you want to the internal or external SD card, install Philz Touch recovery, boot into recovery, wipe cache, Dalvik, install the ROM, and reboot.
You can install any ROM for the d2att as long as the ROM supports the phone's bootloader.
How I know which bootloader I got? If I have the 4.3 jelly bean I have a 4.3 boot loader?
Sent from my SGH-I747M using xda app-developers app
audit13 said:
Any warranty left on your phone? Installing a custom ROM will void your warranty.
If you want to install a custom rom, copy the ROM you want to the internal or external SD card, install Philz Touch recovery, boot into recovery, wipe cache, Dalvik, install the ROM, and reboot.
You can install any ROM for the d2att as long as the ROM supports the phone's bootloader.
Click to expand...
Click to collapse
How I know which bootloader I got? If I have the 4.3 jelly bean I have a 4.3 boot loader?
carlosQC said:
How I know which bootloader I got? If I have the 4.3 jelly bean I have a 4.3 boot loader?
Click to expand...
Click to collapse
Of you loaded a stock 4.3 ROM, you'll have the 4.3 bootloader.
audit13 said:
Of you loaded a stock 4.3 ROM, you'll have the 4.3 bootloader.
Click to expand...
Click to collapse
thank you for your help
Since you have TWRP installed, you not flash custom ROMs. Look around for a ROM you like, download it to your phone's SD card, boot into recovery, wipe cache, Dalvik, flash ROM, reboot.
audit13 said:
Since you have TWRP installed, you can not flash custom ROMs. Look around for a ROM you like, download it to your phone's SD card, boot into recovery, wipe cache, Dalvik, flash ROM, reboot.
Click to expand...
Click to collapse
He meant you CAN flash custom roms.
As long as the rom isn't packaged with a modem or bootloader you can flash any AT&T rom as you please.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
theramsey3 said:
He meant you CAN flash custom roms.
As long as the rom isn't packaged with a modem or bootloader you can flash any AT&T rom as you please.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
Thanks for catching my error. I edited my original post.
audit13 said:
Thanks for catching my error. I edited my original post.
Click to expand...
Click to collapse
No problem hope you would do the same for me.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
so from what i understand about updating the bootloader to MJB, i can only flash custom ROMs based off TouchWiz 4.3 and up, correct?
but AOSP/CM based ROMs can be any version? as long as the bootloader is supported on that ROM? and worst case scenario, i can flash CM10.1.3 (Android 4.2.2)?
currently i'm on S3Rx 2.2, which uses Android 4.1.2. there would be no point in making a nandroid backup, since the bootloader would be updated and i could no longer use this ROM, correct?
i was going to follow this guide:
http://forum.xda-developers.com/showthread.php?t=2321310
and then use this ROM:
http://forum.xda-developers.com/showthread.php?t=2252932
***************SOLVED:***************
flash the MJB bootloader via custom recovery following the above guide.
then flash the MJB modem via custom recovery with this guide:
http://forum.xda-developers.com/showthread.php?t=1831898
reboot to phone (i did, not sure if necessary tho)
then reboot to recovery, flash new custom ROM.
done.
a mistake i did was i only flashed the bootloader first. rebooted, then flashed new ROM. in which case i had no wifi and data. so i flashed the modem, rebooted, no wifi and data still. rebooted into recovery, factory reset, wipe cache, wipe dalvik, and everything worked fine after that.
mrhomiec said:
so from what i understand about updating the bootloader to MJB, i can only flash custom ROMs based off TouchWiz 4.3 and up, correct?
but AOSP/CM based ROMs can be any version? as long as the bootloader is supported on that ROM? and worst case scenario, i can flash CM10.1.3 (Android 4.2.2)?
currently i'm on S3Rx 2.2, which uses Android 4.1.2. there would be no point in making a nandroid backup, since the bootloader would be updated and i could no longer use this ROM, correct?
i was going to follow this guide:
http://forum.xda-developers.com/showthread.php?t=2321310
and then use this ROM:
http://forum.xda-developers.com/showthread.php?t=2252932
Click to expand...
Click to collapse
You could install the MJ2 bootloader and MJB modem which would allow you the ability to go back. Once you are on MJB bootloader, there is not going back without bricking. If you ever find that you need to revert back for any reason you will be stuck. If this does not bother you, then go for it.
aybarrap1 said:
You could install the MJ2 bootloader and MJB modem which would allow you the ability to go back. Once you are on MJB bootloader, there is not going back without bricking. If you ever find that you need to revert back for any reason you will be stuck. If this does not bother you, then go for it.
Click to expand...
Click to collapse
i read somewhere that MJ2 was unstable or something. cause it was a preview leak?
but back to my first question, MJB makes it so i can only flash TouchWiz-based ROMs 4.3 and up? so i will be good to use AOSP-based ROMs of any version?
For clarification purposes:
If you upgrade to MJB you will have the 4.3 KNOX apps (OS) and KNOX bootloader (Firmware). You can easily root following this guide: http://forum.xda-developers.com/showthread.php?t=2538991
Once rooted by following the guide noted above you will have the 4.3 KNOX (OS) removed BUT not the KNOX bootloader. With the KNOX bootloader you will never be able to downgrade the bootloader. What that means is that you can never use odin to flash an older firmware or you will brick!
Now that your MJB is rooted you can flash any ROM you want 4.1.2, 4.2.2, 4.3, 4.4.2 since most custom ROMS dont include the bootloader in the ROM package.
Hope this clears things up?
flynhawn2002 said:
For clarification purposes:
If you upgrade to MJB you will have the 4.3 KNOX apps (OS) and KNOX bootloader (Firmware). You can easily root following this guide: http://forum.xda-developers.com/showthread.php?t=2538991
Once rooted by following the guide noted above you will have the 4.3 KNOX (OS) removed BUT not the KNOX bootloader. With the KNOX bootloader you will never be able to downgrade the bootloader. What that means is that you can never use odin to flash an older firmware or you will brick!
Now that your MJB is rooted you can flash any ROM you want 4.1.2, 4.2.2, 4.3, 4.4.2 since most custom ROMS dont include the bootloader in the ROM package.
Hope this clears things up?
Click to expand...
Click to collapse
Yes it does! Thank you!!
I'm on the latest bootloader and modem and I haven't had any trouble flashing any aosp based roms. Only thing I was told you might have to take the bootloader line out of the update script, but so far I haven't had to at all.
flynhawn2002 said:
If you upgrade to MJB you will have the 4.3 KNOX apps (OS) and KNOX bootloader (Firmware). You can easily root following this guide: http://forum.xda-developers.com/showthread.php?t=2538991
Click to expand...
Click to collapse
just wanted to clarify, i'm already rooted, so i was going to follow the guide from my first post (since this guide has ZIP files i can flash in CWM):
http://forum.xda-developers.com/showthread.php?t=2321310
Flashing in recovery
If you've downloaded a flashable .ZIP from above, copy it to your SD card or internal storage. Reboot your phone into recovery mode (you can do this by holding "Volume Up" and "Home" while powering on your device; let go of the buttons when you see "Recovery booting..." in blue text in the top left of the screen) and install the .ZIP as an update. Reboot, and you're done.
Note: After flashing in recovery, you need to reboot before you (and ROM installers) actually see the new version number.
Click to expand...
Click to collapse
would i reboot first, then flash a new ROM?
or should i flash the bootloader, then immediately flash the new ROM?
UPDATE: so i ended up just following the ZIP file guide:
http://forum.xda-developers.com/showthread.php?t=2321310
and now i don't have data or wifi. i flashed the modem from here:
http://forum.xda-developers.com/showthread.php?t=1831898
ANOTHER UPDATE:
after i went into recovery, factory reset, wipe cache, wipe dalvik. the phone is recognizing wifi and data now. woo!
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
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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.
So I'm planning to switch carriers and I'm wondering how I can unlock my i747M locked to Fido that's running OctOS L 5.1.1. If I have to downgrade, how do I transfer all my current app data and pic's. Also, is it possible to keep the unlock if you were to update you phone to a higher version or install a custom ROM or install the nandroid backup you made before unlocking? Please leave me with some important things to know about while unlocking your phone if possible!
If the phone is running a 4.3 or newer bootloader, you'll have to buy an unlock code.
In order to enter the unlock code, the phone should be running a stock samsung ROM from sammobile.
I suggest creating a nandroid backup with TWRP, copy the backup to your computer, flash the stock ROM, perform a factory reset after flashing stock, unlock, flash TWRP, restore nandroid.
audit13 said:
If the phone is running a 4.3 or newer bootloader, you'll have to buy an unlock code.
In order to enter the unlock code, the phone should be running a stock samsung ROM from sammobile.
I suggest creating a nandroid backup with TWRP, copy the backup to your computer, flash the stock ROM, perform a factory reset after flashing stock, unlock, flash TWRP, restore nandroid.
Click to expand...
Click to collapse
so, in a nutshell, i just need to downgrade my phone to a stock rom of 4.3 or below and just search up a video of how to unlock it using the keypad method?
than if i wanted to, i could use the nandroid backup i did before and flash it and still have an unlocked phone?
You cannot use the free method once the phone is running a 4.3 or newer bootloader because you cannot properly run the 4.1.1 modem on a 4.3 or 4.4.2 bootloader and the 4.3 or 4.4.2 bootloader cannot be downgraded to a 4.1.1 bootloader.
Before flashing anything, which bootloader is on the phone?
audit13 said:
You cannot use the free method once the phone is running a 4.3 or newer bootloader because you cannot properly run the 4.1.1 modem on a 4.3 or 4.4.2 bootloader and the 4.3 or 4.4.2 bootloader cannot be downgraded to a 4.1.1 bootloader.
Before flashing anything, which bootloader is on the phone?
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Click to collapse
Sorry for the noob question, but how do i found out my bootloader?
If this helps, my baseband is I747MVLUFOB3
I actually just logged on to get similar clarification. I have an unlock code, but it does not work when I enter it using OctOS-M. Do I need to be on a stock rom to unlock? Can I easily jump back to a stock rom, then back again to a marshmallow rom?
JoshMcMadMac said:
I actually just logged on to get similar clarification. I have an unlock code, but it does not work when I enter it using OctOS-M. Do I need to be on a stock rom to unlock? Can I easily jump back to a stock rom, then back again to a marshmallow rom?
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Click to collapse
From what ive heard, you have to be on a stock rom. As of google, even then, some users have problems or cant, which from what ive heard, can be fixed by downgrading to 4.3 (make sure ur bootloader is the same or your phone WILL be bricked).
Please note that this is from what ive heard and may not be accurate.
Install the Samsung phone info app from the play store as it will tell you a lot.
audit13 said:
Install the Samsung phone info app from the play store as it will tell you a lot.
Click to expand...
Click to collapse
My boot loader seems to be the same as my baseband.
What is the bootloader version?
GamingDevilsCC said:
From what ive heard, you have to be on a stock rom. As of google, even then, some users have problems or cant, which from what ive heard, can be fixed by downgrading to 4.3 (make sure ur bootloader is the same or your phone WILL be bricked).
Click to expand...
Click to collapse
That sounds problematic...I am on NJ2. I am not having any luck finding anything about getting back to stock on the newest bootloader.
audit13 said:
If the phone is running a 4.3 or newer bootloader, you'll have to buy an unlock code.
In order to enter the unlock code, the phone should be running a stock samsung ROM from sammobile.
I suggest creating a nandroid backup with TWRP, copy the backup to your computer, flash the stock ROM, perform a factory reset after flashing stock, unlock, flash TWRP, restore nandroid.
Click to expand...
Click to collapse
Do you think this one would work?
https://z3x-team.com/forum/topic.php?id=9505
Whats a CWM anyways?
CWM is Clockworkmod with is a custom recovery. CWM is outdated as it has not been updated for quite some time. Many recent custom ROMs now require TWRP.
You may be able to software unlock the phone but you'll probaby need a UART cable and Samsung Pro tools. I don't believe Pro Tools is free.
The linked thread is from 2014 and, in 2014, many phones were running 4.1.2 which meant the phone could be downgraded to 4.1.1 using and sim unlocked using the dialler's menu options.