I had bought a GS3 a few years back but never used it. Had some carrier issues as all the SIMs here in India were not supported. Ever since I bricked my Moto E, I decided to start using it again.
I realised that the sticker on the rear of my phone says it's I9300 (International Version) of the S3 but the firmware and bootloader in downloader mode shows it as SGH-747 which I believe is the d2att device. I decided to try and flash the I9300 bootloader and flash the I9300 firmware using Odin to sort my carrier network issues (modem difference issues maybe). Ended up causing a hard brick on my phone didn't turn on properly.
I used the bootloader debrick image from: https://androidfilehost.com/?fid=23501681358549813 and was able to boot my phone into download mode. I assume it's the I747 image which helped me turned on my phone although the battery and rear panel says it's I9300. Nevertheless, I downloaded the 4.0.4 firmware from AndroidMTK.com to flash on my bootloader to completely debrick the device. Downloaded the I747 as the debrick I downloaded earlier bootloader is I747 one.
I tried flashing the firmware and get the below error:
Code:
WARRANTY BIT: 1
BOOTLOADER AP SWREV: 3
SW REV CHECK FAIL: Fused 3 > Binary 0
Is my bootloader a Kitkat Bootloader? Am I flashing the wrong firmware? Should I flash the 4.4.2 firmware and see if it works? Would really appreciate if anyone could guide me here. I really want to unbrick my phone.
I can access my TWRP by using the debrick image from a SD Card. I tried booting into TWRP and Flashing CM 12.1, Lineage 14.1 and Slim 6. I have previously used these three roms on the device. Now, they won't boot after getting installed. I'm stuck at bootlogo when rebooting. Would appreciate any help.
Can anyone help out with this?
Are you able to determine the model # with the phone in download mode?
Since there is mention of "warranty bit", the phone must be running a 4.3 or newer bootloader which cannot be downgraded.
AT&T never released a full Odin-flashable firmware after 4.1.1.
audit13 said:
Are you able to determine the model # with the phone in download mode?
Since there is mention of "warranty bit", the phone must be running a 4.3 or newer bootloader which cannot be downgraded.
AT&T never released a full Odin-flashable firmware after 4.1.1.
Click to expand...
Click to collapse
The phone model is the SGH-747. It's the AT&T variant. Which firmware should I flash then?
Flash this: https://forum.xda-developers.com/ga...ile-sgh-i747ucufne4v4-4-2attall-odin-t3305899
Related
I Used To Own A Tmobile S3 Which I Enjoyed Using Custom Roms Like Cm 12, LiquidSmooth 4.1 And Pac Rom Just To Name A Few And The Lcd Broke . So One Of My Friend Is Selling Me A Used At&t S3 On Stock 4.4.2 For Quite Cheap. But My Problem Is ( Correct Me If Im Wrong) I Think I Read An Article Stating That You Cannot Use Custom Roms On S3s On Stock 4.4.2 Or It Will Brick It . Is This Correct ? An S3 Serves No Purpose To Me On Stock TOUCHWIZ . So Is It Possible To Root And Flash Custom Roms On S3s On OFFICIAL STOCK 4.4.2 TOUCHWIZ ?
Jaii_Versace said:
I Used To Own A Tmobile S3 Which I Enjoyed Using Custom Roms Like Cm 12, LiquidSmooth 4.1 And Pac Rom Just To Name A Few And The Lcd Broke . So One Of My Friend Is Selling Me A Used At&t S3 On Stock 4.4.2 For Quite Cheap. But My Problem Is ( Correct Me If Im Wrong) I Think I Read An Article Stating That You Cannot Use Custom Roms On S3s On Stock 4.4.2 Or It Will Brick It . Is This Correct ? An S3 Serves No Purpose To Me On Stock TOUCHWIZ . So Is It Possible To Root And Flash Custom Roms On S3s On OFFICIAL STOCK 4.4.2 TOUCHWIZ ?
Click to expand...
Click to collapse
The bootloader is not locked on the AT&T S3 (I747). You can use Odin to flash a custom recovery and flash any ROMs for d2att/d2lte you want. No unlocking required. It is a pretty modder friendly phone.
The thing you cannot do on the newer bootloaders is downgrade the bootloader. Attempts to downgrade anything beyond the 4.3 bootloader will result in a hard brick. This also prevents you from using the free sim unlocking method because it involves a firmware downgrade to 4.1. If you need to sim unlock the phone to use it on a different network you'll have to get a code from AT&T (they should provide one since a phone this old just about has to be off contract) or purchase one from a third party.
Jaii_Versace said:
... I Think I Read An Article Stating That You Cannot Use Custom Roms On S3s On Stock 4.4.2 Or It Will Brick It . Is This Correct ?... So Is It Possible To Root And Flash Custom Roms On S3s On OFFICIAL STOCK 4.4.2 TOUCHWIZ ?
Click to expand...
Click to collapse
I concur with @jason2678
I have an AT&T SGS3 (d2att/i747) that is on the NE4 bootloader and modem (4.4.2) and am running CM11 atm. As a matter of fact, none of the CM or AOSP roms since late in 4.4.2 development will run unless you are on one of the 4.4.2 bootloaders (NE4, NJ1, NJ2)
What you stated, quoted above, is true for the Verizon SGS3 (d2vzw/i535).
jason2678 said:
The bootloader is not locked on the AT&T S3 (I747). You can use Odin to flash a custom recovery and flash any ROMs for d2att/d2lte you want. No unlocking required. It is a pretty modder friendly phone.
The thing you cannot do on the newer bootloaders is downgrade the bootloader. Attempts to downgrade anything beyond the 4.3 bootloader will result in a hard brick. This also prevents you from using the free sim unlocking method because it involves a firmware downgrade to 4.1. If you need to sim unlock the phone to use it on a different network you'll have to get a code from AT&T (they should provide one since a phone this old just about has to be off contract) or purchase one from a third party.
Click to expand...
Click to collapse
Hello I am new here and could you please tell me the status of my phone since the phone does not provide me with option to enter unlock code after I inserted other carrier SIM.
I already have my unlock code given by AT&T.
I have CWM custom recovery installed
My phone info from Samsung Phone info Apps is
Bootloader version : I747UCUEMJB
PDA Version : I747UCUFNE4
CSC Version : I747ATTFNE4
Baseband Version : I747UCUEMJB
I have searched and tried with service mode method *#197328640# without success
Is Sim unlock related to bootloader
Thanks
car2carl said:
Hello I am new here and could you please tell me the status of my phone since the phone does not provide me with option to enter unlock code after I inserted other carrier SIM.
I already have my unlock code given by AT&T.
I have CWM custom recovery installed
My phone info from Samsung Phone info Apps is
Bootloader version : I747UCUEMJB
PDA Version : I747UCUFNE4
CSC Version : I747ATTFNE4
Baseband Version : I747UCUEMJB
I have searched and tried with service mode method *#197328640# without success
Is Sim unlock related to bootloader
Thanks
Click to expand...
Click to collapse
It appears that you have an NE4/Android4.4.2/KitKat rom installed over 4.3 bootloader and modem. I have seen several custom TouchWiz roms that run fine with this setup as long as one of a couple of custom kernels were installed. CM and AOSP roms will also run in this condition. BUT, from what I have read you will not be able to use the unlock codes. My reading indicates that you must be on complete stock ROM for the code to work, including stock recovery instead of CWM. ALSO, what I have read says that you only gt five attempts before the code becomes invalid.
I don't know why your phone is not asking for the unlock code, unless it has already been carrier unlocked. Even thouhg it is not asking for the code, does it function as it should?
Frequently the service modes do not work on custom roms, even TW based ones, because they are not using the stock dialers. I have also seen it reported that some were disabled with the 4.3 update and others in more recent updates.
Proceed carefully.
You may be able to enter the unlock code if the phone is running a stock dialler with a matching bootloader and modem combination.
dawgdoc said:
It appears that you have an NE4/Android4.4.2/KitKat rom installed over 4.3 bootloader and modem. I have seen several custom TouchWiz roms that run fine with this setup as long as one of a couple of custom kernels were installed. CM and AOSP roms will also run in this condition. BUT, from what I have read you will not be able to use the unlock codes. My reading indicates that you must be on complete stock ROM for the code to work, including stock recovery instead of CWM. ALSO, what I have read says that you only gt five attempts before the code becomes invalid.
I don't know why your phone is not asking for the unlock code, unless it has already been carrier unlocked. Even thouhg it is not asking for the code, does it function as it should?
Frequently the service modes do not work on custom roms, even TW based ones, because they are not using the stock dialers. I have also seen it reported that some were disabled with the 4.3 update and others in more recent updates.
Proceed carefully.
Click to expand...
Click to collapse
Thanks for respond
I had this phone since 3 years ago (new from ATT) and rooted stock rom with CWM 6.0.4.7 recovery touch . and I remember that I could unlocked through SERVICE MODE when I was overseas. ( sure I had used this phone with Other carrier) about 1 year ago I put this phone in my drawer I did factory reset and installed Stock firmware and update OTA to 4.3.
Last week I want to use this phone with Tmobile SIM but got Phone Not Allowed MM#6 message . The rom was still 4.3, Contact AT&T and got Unlock code.
but this phone didn't ask for unlock code entry option and still 4.3 , tried the whole weekend with service mode and upgrade to 4.4.2 via CWM recovery.
and still no luck
With your suggestion , it means that I don't have choice to downgrade back to 4.3 rom same with my bootloader and baseband? I heard we can't downgrade if we already in 4.4.2 , is that true?
But I still use stock recovery from CWM.
Before I proceed with replacing with stock recovery, is the stock recovery have to be 4.3 stock recovery or any version for S3? do I need to use odin to change to stock recovery?
if you have good link please help?
Thanks again
---------- Post added at 06:40 AM ---------- Previous post was at 06:33 AM ----------
audit13 said:
You may be able to enter the unlock code if the phone is running a stock dialler with a matching bootloader and modem combination.
Click to expand...
Click to collapse
Stock dialer means the entire Rom must be replaced to match my bootloader and modem combination or just replace the dialer in my case and still use 4.4.2?
Appreciated if you can help, thanks
Stock dialler requires a stock Samsung kernel.
From what I am seeing, you are on the 4.3 bootloader and modem. As I said before, there are custom TouchWiz 4.4.2 Roms that will run on the 4.3 bootloader and modem. Changing to a 4.3 rom, stock or otherwise, therefore would not be downgrading your bootloader and modem.
What rom are you on?
Some of the custom TouchWiz roms use dialers from the S5, therefore not stock for the S3.
Some of the custom TouchWiz Roms use the stock kernel, some use a custom kernel.
Did you flash a custom kernel?
What is your kernel version? (check under Settings > About Phone)
With the answers to the questions I asked, audit13 and I may be able to give more definite guidance. It could be as simple as flashing the stock kernel and a stock dialer. But, I can't tell at the moment.
car2carl said:
Thanks for respond
I had this phone since 3 years ago (new from ATT) and rooted stock rom with CWM 6.0.4.7 recovery touch . and I remember that I could unlocked through SERVICE MODE when I was overseas. ( sure I had used this phone with Other carrier) about 1 year ago I put this phone in my drawer I did factory reset and installed Stock firmware and update OTA to 4.3.
Click to expand...
Click to collapse
Are you saying you unlocked it before? If so it should still be unlocked. Flashing/wiping won't affect that, so it's pretty much a permanent thing. If so, maybe the Sim card you're using is an older one? they don't always work on tmobiles networks.
Sent from my SGH-T999 using Tapatalk
DocHoliday77 said:
Are you saying you unlocked it before? If so it should still be unlocked. Flashing/wiping won't affect that, so it's pretty much a permanent thing. If so, maybe the Sim card you're using is an older one? they don't always work on tmobiles networks.
Sent from my SGH-T999 using Tapatalk
Click to expand...
Click to collapse
audit13, dawgdoc, DocHoliday77
Thank you for your responses , Sorry I couldn't response any sooner as I worked in mountain/forest area that browsing the web is luxury
(yes I remember for sure I have used this cell phone overseas couple times and the way I unlocked through service mode. Way before AT&T OTA update since new)
I have weird situation that make me wondering if I had unlocked my S3 since message
"PHONE NOT ALLOWED MM#6" comes up if I use any other carrier beside AT&T
Per http://forum.xda-developers.com/showthread.php?t=2789917
thanks to OP
I just managed to change my bootloader to I747UCUFNE4 and also my baseband version to I747UCUFNE4
I still keep my CWM 6.0.4.7 recovery touch
I have Flashed with countless other rom such below:
I747UCUFNE4_Stock_Rooted_Odex.zip
I747UCUFNE4_Stock_Rooted_Deodex_3-31-15.zip
I747UCUFNE4_Stock_Rooted_3-31-15.zip
and even custom rom without any success
This was happened with my S3 after flash.
if I flashed with inserted active SIM Card (T Mobile or foreign SIM Card)
I will see PHONE NOT ALLOWED MM#6 after reboot
if I flashed without any SIM Card inserted after reboot :
- inserted foreign sim card and reboot again
I will have AT&T as roaming provider and for about few seconds received text message about fee from SIM issuer roaming to AT&T so means My S3 is unlocked...
(no... not so much!!!) in few minute I will have "PHONE NOT ALLOWED MM#6" and phone is useless as emergency only.
- inserted T-Mobile Sim Card and reboot again it shows "PHONE NOT ALLOWED MM#6" immediately
My Kernel Version :
3.4.0-1514807
[email protected] #1
Mon May 19 21:00:05 KST 2014
Thank you if you can help.
So you are not getting asked enter a network unlock code when running a stock rom with a foreign sim?
Does your provider use aws frequencies? The i747 does not natively support T-Mobile aws frequencies.
audit13 said:
So you are not getting asked enter a network unlock code when running a stock rom with a foreign sim?
Does your provider use aws frequencies? The i747 does not natively support T-Mobile aws frequencies.
Click to expand...
Click to collapse
No, It doesn't ask at all. just pop up "Phone not allowed MM#6."
my foreign SIM is ok.
I tested on Galaxy Note 4 T-Mo (unlocked) it grabbed ATT roaming,
tested on Iphone 4S (ATT-unlocked) it grabbed Tmobile roaming:laugh:
I just flashed stock recovery and still no go..
do I need to unroot?
Can I flash stock root rom with stock recovery
Thanks
What rom was on the phone when you inserted a foreign sim?
If you are running a Samsung rom, try this:
Www.unlockriver.com/Samsung-unlocking
I am using I747UCUFNE4_Stock_Rooted_3-31-15.zip
I just replaced CWM recovery with UCUFNE4 stock recovery
I did unroot with SuperSU and also
do factory setting through setting menu
basically my phone just as new factory setting but with UCUFNE4
the funny thing is :System Status: Custom is this related I have rooted this device before?
When I turn on bootloader mode (Odin Mode)
product name : SGH-I747
Current Binary: Samsung Official
System Status: Custom
Qualcomm secure boot : enable
warranty bit: 1
bootloader ap Swrev: 3
as I have stated at my 1st post that I had official unlock code from AT&T and got email from them the unlock PIN
but there is no option asking to key in the PIN with other carrier sim inserted .
I have checked also with Swappa esn check
and result is
Blacklisted => Not Indicated
This device does not appear to be globally blacklisted.
spent countless hours just to beat solving this device and read the threads and no result. And still "PHONE NOT ALLOWED MM#6"
Hello
I am currently running CM 12.1 on my SGS3 i747m.
I want to return back to stock rom, the current version offered by Rogers is Kit Kat 4.2.2.
Is this considered a downgrade? (from CM 12..1 to Android 4.2.2) Will I brick my device?
Is returning back to stock rom the only way I can network unlock my phone?
1) it is a downgrade in android versions (lollipop to kitkat. not bootloader/modem).
2) no , will not brick your device as long as not downgrading bootloader/modem.
3) what is your current bootloader/modem version ? (if unsure , you can DL the "samsung info" app from playstore and it will tell you).
http://forum.xda-developers.com/showthread.php?t=2609045
here's the xda thread for that.
4) i belive its the only free method. i think you can pay for an unlock code and not have to return to stock.
5) if returning to stock , here are directions posted by @audit13
http://forum.xda-developers.com/showthread.php?p=66306367
"err on the side of kindness"
So you're telling me I do not have to revert back to stock in order to network unlock? =D
That was my only reason for reverting back to the stock rom.
correct. but i've never had to unlock one so i wouldnt know where to go or how much the code cost.
"err on the side of kindness"
***update: i just bought an unlock code
didn't work. my phone says perso lock.
sigh
if i revert my phone back to stock rom, does the recovery have to be reverted too? or it's all good.
Recovery can be custom or stock. You need to revert to the stock Samsung dialler in order to enter an unlock code.
Easiest method would be to flash the latest 4.4.2 stock Rogers rom from sammobile.com, skip through the set up, power off, insert non-Rogers sim, boot phone, enter unlock code, done.
could I install stock rom via recovery or does it have to be through Odin?
so... I tried to install the stock rom via Odin3 as instructed on Sammobile... but it gets stuck in the glowing Samsung logo during boot.
any ideas?
try thru recovery :what:
"err on the side of kindness"
Did you perform a factory reset/wipe in stock recovery before booting the phone with the newly-flashed rom?
audit13 said:
Did you perform a factory reset/wipe in stock recovery before booting the phone with the newly-flashed rom?
Click to expand...
Click to collapse
i can't access stock recovery
I pressed power+vol up+home button. nothing.
although i get into download mode
i tried this: http://forum.xda-developers.com/gal...13-nightly-t3356062/post66306367#post66306367
and doesn't help =(
Are there any error messages in Odin? You're flashing the correct firmware?
audit13 said:
Are there any error messages in Odin? You're flashing the correct firmware?
Click to expand...
Click to collapse
So I went back to flash the latest stock firmware... and I was able to access the recovery and wipe cache and then factory reset/wipe! it worked!
=D
but I am having the same problem I started. I couldn't unlock my phone.
I entered the unlock code I got from MobileInCanada.com... and it still doesn't work.
I see that there is a free method for Android 4.1.1.
I am currently running Android 4.4.2
From Phone INFO app
Bootloader Version/PDA/CSC/Baseband: I747MWLUFOB3
Do you think I can revert back to Android 4.1.1 and try the free method? Or should I complain to the MobileInCanada about unlock code not working. Seeing as it looks like going back to stock, everything should be easy as pie to network unlock.
So you flashed back to a completely stock rom, inserted a foreign SIM card, you were prompted to enter the network unlock code, and it didn't work?
The imei in the phone matches the imei provided to mobileincanada? I have used mobileincanada but it was a long time ago. I get all my unlock codes from eBay because it's cheaper.
Do not attempt to flash any rom that is 4.3 or older as attempts to do so may hard brick the phone. Once an i747m is running a 4.3 or newer bootloader, the phone can only be unlocked with a code.
audit13 said:
So you flashed back to a completely stock rom, inserted a foreign SIM card, you were prompted to enter the network unlock code, and it didn't work?
The imei in the phone matches the imei provided to mobileincanada? I have used mobileincanada but it was a long time ago. I get all my unlock codes from eBay because it's cheaper.
Do not attempt to flash any rom that is 4.3 or older as attempts to do so may hard brick the phone. Once an i747m is running a 4.3 or newer bootloader, the phone can only be unlocked with a code.
Click to expand...
Click to collapse
Yes! completely right! I inserted my foreign SIM card, entered the unlock code from MobileInCanada and it didn't work.
I double/triple checked the IMEI.
Mobileincanada has a very good reputation. I recommend contacting them for a refund or have them resend the code.
Thank you!
would it be a different code?
If you supply the same imei, the code should be the same. Perhaps mobileincanada looked for the wrong imei in the unlock database.
Hello everybody,
I have bricked my device once (SGH-I747 AT&T) by flashing wrong bootloader to my phone (It's a very noobish mistake, I know) and I had to pay someone to unbrick it by using a J-Tag but this person told me he was "unable to install SGH-i747 bootloaders" and now I'm unable to use LTE because I have a Non-LTE bootloader and modem. I've tried flashing T999L modems but no SIM card/IMEI recognized so I had to go back to T999 modem. The questions are:
Can I Odin flash SGH-I747 bootloader I747UCUEMJ2 without bricking my phone?
My phone is unlocked to use with any operator, will it remain unlocked after this?
My IMEI will be ok after this?
My phone information is:
Baseband: T999UVUEMJC
Bootloader: T999UVUEMJC
Android Version: Lineage 7.0.1
RIL Version: 3.0
Thanks in advance.
I have never heard of anyone being able to flash a T999 bootloader onto an i747.
Did the phone come from AT&T? Did the phone have the AT&T boot screen?
Did you verify the phone's model # in download mode before bricking?
audit13 said:
I have never heard of anyone being able to flash a T999 bootloader onto an i747.
Did the phone come from AT&T? Did the phone have the AT&T boot screen?
Did you verify the phone's model # in download mode before bricking?
Click to expand...
Click to collapse
Thanks for your answer.
Yes, the phone was AT&T, it also says SGH-i747 behind the battery and it was I747 model on settings. It had a 4.1 custom rom when my brother gave it to me. I tried to upgrade it to 4.3 but I didn't know about bootloader stuff and tried to flash a bootloader using twrp so I've bricked the phone. The only way to unbrick it was with j-tag and the person who did this told me he was able to do so with T999 firmwares so now I have a T999 no-lte phone. Would it be risky to change it back with Odin to I747 bootloader and modem? Is there any safe way to do this?
Thanks again.
You can't cross-flash bootloaders with Odin, TWRP, or CWM without the possibility of -rebricking.
Does the IMEI in the phone (dial *#06#) match the imei on the label under the battery?
I'm very surprised that the phone's bootloader had to be cross-flashed. Where did you get the bootloader that you flashed?
audit13 said:
You can't cross-flash bootloaders with Odin, TWRP, or CWM without the possibility of -rebricking.
Does the IMEI in the phone (dial *#06#) match the imei on the label under the battery?
I'm very surprised that the phone's bootloader had to be cross-flashed. Where did you get the bootloader that you flashed?
Click to expand...
Click to collapse
Yes, the IMEI matches. I do not remember where I got that bricker bootloader, neither the installed one (as it was not flashed by me). I can remember that when I received the phone after unbrick, it was SIM locked so I had to give the phone again to this person to fix the SIM-Lock. As far as I know, AT & T I747 is unlocked, so my phone totally became T999.
Any safe way to try this? Or will I be using T999 forever?
Thanks again.
Boot into download mode and confirm that the model # is sgh-t999. If it is, you're stuck.
I've readed that full back to stock might help but it's nearly the same process of flashing everything so I'm not sure...
audit13 said:
Boot into download mode and confirm that the model # is sgh-t999. If it is, you're stuck.
Click to expand...
Click to collapse
It says T999 all the way lol. I think I'm stuck.
Thanks buddy.
Sorry, you are stuck with T-mobile ROMs.
Your post is the first oneI have seen where an AT&T s3 has been transformed via jtag into a T999.
audit13 said:
Sorry, you are stuck with T-mobile ROMs.
Your post is the first oneI have seen where an AT&T s3 has been transformed via jtag into a T999.
Click to expand...
Click to collapse
As this is an old device, I will try to flash it back to SGH-I747 bootloader before buying another phone. If succeed or not I will tell you the results here. Meanwhile, I'll be enjoying my T999 :silly:
Thanks.
Trying to save an S9, SM-G960U[SS] G960USQU9AUA1, Not sure of original carrier it is locked to, Canadian version likely either Telus or Bell
Wanted to upgrade to 10 or try lineage, flashed combination to unlock USB debugging and developer options, this worked
However cannot flash anything else, using patched ODIN
TWRP fails auth(fail), some US ones have the boot loader locked and it cannot be replaced?
Any firmware I can find fails - auth(fail)
Only one worked from a SM-G960W, it will load with ODIN but just boot loops
I don't think its a problem with ODIN as it can flash combination and the W version, just not anything else
Is there any hope for this thing or just scrap bin? Not sure what else to try
I feel like I've done a big door.
I work in a cell repair shop and we had an ATT unlocked S20 FE that came in and I liked it so I bought it.
Long story short. I did some reading that you can install the XAA software using patched Odin. This was essential because I'm on Tmobile and didnt get 5G on the ATT firmware.
Easy enough. The device now has 5G access on Tmobile, and identifies itself as SM-G781U1/DS in settings.
The issue I'm facing is now unlocking the bootloader. The XAA firmware doesn't have the option and I'm unable to flash back to ATT firmware without (auth) fail errors in Odin and 'Secure boot check fail: PIT' on download mode.
Here's what I've tried that's failed so far:
- show option using time/date change
- software updating (I do receive OTA)
- flashing stock ATT firmware
- flashing stock TMB firmware
- Fastboot oem unlock (command not found)
- fastboot getvar unlocked (unlocked: no)
I'm about out of ideas, could use some guidance on where to begin looking next, I really like the power of this phone and wanna see what custom roms bring.
Device stats:
Galaxy S20FE SM-G781U (with U1 XAA flash)
CSC: ATT
Build: G781U1UESAGWC7
Service provider info:
G781U1_OYM_TMB_13_0011
TMB/TMB/ATT
Android 13, One UI 5.1
To be honest the custom rom screne for this phone is not so great yet. I imagine once the official support ends we will be getting some well developed custom roms.
As for the bootloader unlock issue, try using smartswitch to restore stock firmware, or try changing only the CSC if the firmware is multi-csc, the oem unlock option might reapper.
What kind of patched odin did you use to flash the XAA firmware? stock odin should be able to flash it too. As far as i am aware north american samsung phones do not offer oem unlock. The option probably dissapeared for good. There was etoken but since you are on android 13 i imagine the exploits have been already patched. You're basically stuck on XAA now. You can try using samkey to change the csc but i doubt that even that can help you oem unlock it.
hoptockets said:
I feel like I've done a big door.
I work in a cell repair shop and we had an ATT unlocked S20 FE that came in and I liked it so I bought it.
Long story short. I did some reading that you can install the XAA software using patched Odin. This was essential because I'm on Tmobile and didnt get 5G on the ATT firmware.
Easy enough. The device now has 5G access on Tmobile, and identifies itself as SM-G781U1/DS in settings.
The issue I'm facing is now unlocking the bootloader. The XAA firmware doesn't have the option and I'm unable to flash back to ATT firmware without (auth) fail errors in Odin and 'Secure boot check fail: PIT' on download mode.
Here's what I've tried that's failed so far:
- show option using time/date change
- software updating (I do receive OTA)
- flashing stock ATT firmware
- flashing stock TMB firmware
- Fastboot oem unlock (command not found)
- fastboot getvar unlocked (unlocked: no)
I'm about out of ideas, could use some guidance on where to begin looking next, I really like the power of this phone and wanna see what custom roms bring.
Device stats:
Galaxy S20FE SM-G781U (with U1 XAA flash)
CSC: ATT
Build: G781U1UESAGWC7
Service provider info:
G781U1_OYM_TMB_13_0011
TMB/TMB/ATT
Android 13, One UI 5.1
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for some reason Samsung doesn't allow bootloader unlocks in the US anymore. if as a phone repair guy you have the means force older firmware onto the device then you could pay someone to get an unlock token on the DL from a contact of theirs.
downgrading isn't something we can do at all hence me mentioning you maybe having access to resources others don't.
if you could get it onto the very first firmware you'd have a chance, if you can't there's no chance.