Samsung Galaxy G 955XU Firmware – Discussion – Development

UPDATE – In this thread I was failed to find firmware solution for 955XU device but instead I was able to replace motherboard from G-955-U successfully. you can read that post from here.–>  

This thread allocated to discussion or reports about G 955XU particular samsung galaxy s8+ LDU module. Since samsung doesn’t sell this units officially lot of peoples calming those devices are stolen. but I believe there are ways to legally own this device. however if someone got 955XU and tried to play with OS and now in trouble and looking for stock firmware, I cannot say I have a solution but I must say I’m in the same boat as you are.

Like I said I have flashed 955XU device with this firmware for root the device. And end up with security error and now I’m trying to revers it back to at least it’s original condition. unfortunately for 955XU model there are no free stock firmware in any known places. and there are no developments or supports available. I have look everywhere for weeks to find some help but no luck. In my research I have seen people like me ask 955XU firmware and such questions in threads like Xda but no one gets answers and lot of are banned or threads closed due to their policies.

So in this I want make place to share knowledge about 955XU , at least share my knowledge with among others.

 

 

 

Places I found that 955XU Stock firmware’s available ->

Easy-firmwear – https://easy-firmware.com/index.php?a=browse&b=file-info&id=87351

GSM-Files – http://www.gsm-file.com/files/smg955xu-9161

Combine Files – http://combinefile.com/home/browse/category/id/8028/SM_G955XU_Firmware/

 

There are more places on the web, however I have purchased firmwear on Combinefiles.com but didn’t work. that firmware only have BL and CSC, I’ll post result below with different flash tries. 

 

According to some threads in the Internet  LDU units of old models (S7,6) firmware and it’s normal firmware’s only different is modem.bin file and some other bin files. in S8+ firmwares we can see modem.bin file in CSC file. And other bin files locations are unknown. 

G955X RDU have it’s arrival G955F and some claimed these devices firmwares are compatible to each other. But there are no source about 955XU arrival. Also 955X and 955F are Exynos variant, So if there are 955XU arrival exist it has to be one of flowing module.

955UNot Worked

955U1 – Not Worked

955A – Waiting for test

955P – Waiting for test

955T- Waiting for test

955V – Waiting for test

955R4 – Waiting for test

955W – Waiting for test

9550 – snapdragon variant but it’s storage 128GB (this couldn’t be one – memory mapping has to be different I suppose )

 

Since 955XU is snapdragon variant BOOT LOCKER is still cannot be unlocked. which means no custom roms.

there is now TWRP is available for Galaxy S8 and S8+ (Snapdragon) But didn’t work for me.

1.


955XU Firmware

Odin – BL + CSC

dm-verity error 0x02


2.


955U Firmware

Odin – BL + AP

dm-verity error 0x02


3.


955U Firmware + 955XU Firmware

Odin – BL (955U) + AP (955U) +CSC (955XU)

odin error – model mismatch


4.


SMPWND Firmware

Comsy Odin – BL + AP + CSC + CP

Security error – this phone has been flashed with unauthorized software..


5.


SMPWND Firmware + 955XU Firmware

Comsy Odin – BL + AP + CP + CSC (955XU)

Security error – this phone has been flashed with unauthorized software..


6.


955XU Firmware

Comsy Odin – BL +CSC in AP tab

Stuck on logo


7.


955XU Firmware

Comsy Odin – CSC

Repartition – yes

Stuck on logo


8.


955XU Firmware

Comsy Odin – BL + CSC

Repartition – yes , Auto reboot – no

Stuck on logo


9.


SMPWND Firmware

Comsy Odin – BL

Security error – this phone has been flashed with unauthorized software..


10.


SMPWND Firmware + 955XU Firmware

Comsy Odin – BL(955XU) + AP (SMPWND) +CP (SMPWND)

Stuck on logo


11.


SMPWND Firmware + 955XU Firmware

Comsy Odin – BL(955XU) + AP (SMPWND) +CP (SMPWND) + CSC (SMPWND)

Stuck on logo


12.


Combination File – COMBINATION_FA70_G955USQU1AQG3

Odin – AP

Security error – this phone has been flashed with unauthorized software..


13.


955XU Firmware

Odin – BL

odin error – Model mismatch failed


14.


955XU Firmware

Comsy Odin – BL

Stuck on logo


15.


955XU Firmware

Comsy Odin -CSC

Repartition – yes , Phone EFS clear – yes

Stuck on logo

 


16.


Combination File – COMBINATION_FA70_G955USQU1AQG3

Comsy Odin – AP

Security error – this phone has been flashed with unauthorized software..


17.


955XU Firmware

Comsy Odin – BL + CSC

Repartition – yes , Phone EFS clear – yes , Boot loader update – yes

Stuck on logo


18.


Combination File edited – COMBINATION_FA70_G955USQU1AQG3 + 955XU CSC files repack

Comsy Odin – AP

Security error – this phone has been flashed with unauthorized software..


19.


955XU Firmware

Comsy Odin – CSC on AP tab

Security error – this phone has been flashed with unauthorized software..


20.


955XU Firmware

Comsy Odin – BL

Stuck on logo


21.


Combination File – COMBINATIONF_A70_G955USQU1AQD8

Comsy Odin – AP

Security error – this phone has been flashed with unauthorized software..


22.


955U Firmware + 955XU Firmware

Comsy Odin – BL (955XU) +CSC (955XU) + USERDATA (955U) in AP tab

Repartition – yes , Phone EFS clear – yes

Stuck on logo


23.


955XU Firmware modified

Comsy Odin – BL (955XU) +CSC (955XU + 955U)

Stuck on logo


24.


955U Firmware

Comsy Odin – BL + AP

Security error – this phone has been flashed with unauthorized software..


25.


955XU Firmware modified

Comsy Odin – BL + CSC (955U + 955XU + SMPWND) repack

dm-verity error 0x02


26.


 

2 thoughts on “Samsung Galaxy G 955XU Firmware – Discussion – Development”

  1. have you found a solution, i closed one of my stores down and a decided to take phones off display and resell them at my current store. im stuck with this phone has been flashed with unauthorized software. please if you have a solution please help me out . thank you

    1. Not for this model, It’s seems like it’s imposable to unlock this error with locked boot loader. Only successful way I could find is motherboard replacement from 955U device.

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