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Go Back   GSM-Forum > Product Support Sections > Hard/Software Products (official support) > GSMServer Products > SigmaKey

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Old 06-10-2022, 20:48   #1 (permalink)
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Exclamation P-Smart 2021 Downgrade Problem [SOLVED]


Hi. How to downgrade PPA-LX1 without downgrade .skf files? There is no such file in boot-loader. com. Where can I find P-Smart 2021 downgrade file? Please help.

Last edited by Gsmserver; 06-12-2022 at 08:39.
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Old 06-11-2022, 08:43   #2 (permalink)
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Quote:
Originally Posted by Rauf86 View Post
Hi. How to downgrade PPA-LX1 without downgrade .skf files? There is no such file in boot-loader. com. Where can I find P-Smart 2021 downgrade file? Please help.
Please use this manual for downgrading: Enable downgrade using SW or HW testpoint.
Don't forget to note actual information about the phone, like firmware version and so on.
Doing the backup of the firmware is also a recommendation.
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Old 06-11-2022, 08:52   #3 (permalink)
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Originally Posted by Gsmserver View Post
Please use this manual for downgrading: Enable downgrade using SW or HW testpoint.
Don't forget to note actual information about the phone, like firmware version and so on.
Doing the backup of the firmware is also a recommendation.
But this is UFS model. I have tried both tp and upgrade method, but enable downgrade option is gray, how to fix it?
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Old 06-11-2022, 09:06   #4 (permalink)
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Connect the phone to PC using USB cable in the FACTORY mode.
It should be detected as HUAWEI USB COM 1.0 device (VID12D1 PID3609) in the System. In most cases Testpoint has to be used to force the device to FACTORY mode

You can use SOFTWARE TESTPOINT for low firmware and security versions.

Last edited by Gsmserver; 06-11-2022 at 09:13.
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Old 06-11-2022, 09:45   #5 (permalink)
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Quote:
Originally Posted by Gsmserver View Post
Connect the phone to PC using USB cable in the FACTORY mode.
It should be detected as HUAWEI USB COM 1.0 device (VID12D1 PID3609) in the System. In most cases Testpoint has to be used to force the device to FACTORY mode

You can use SOFTWARE TESTPOINT for low firmware and security versions.
I have used Factory mode, USB Upgrade mode, selected files ashown on SigmaKey site, but downgrade option is still gray.
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Old 06-11-2022, 09:47   #6 (permalink)
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Downgraded via HiSuite Proxy 3.02 method, thanks.
But please fix this poblem, because UFS models needs 7th file - .skf downgrade file, but nowhere such file-

"STEP 5: Select lower fw version + downgrade file:

Open HiSilicon tab and go to Flash bookmark
Select DBA adapter port in the ports tab
Select files for flashing:
Important! You need to select 7 files for downgrading exactly in this order.
FLASH FILE 1: PTABLE.APP from update_sd_base folder
FLASH FILE 2: PTABLE.APP from update_sd_cust folder
FLASH FILE 3: PTABLE.APP from update_sd_preload folder
FLASH FILE 4: UPDATE.APP from update_sd_base folder
FLASH FILE 5: UPDATE.APP from update_sd_cust folder
FLASH FILE 6: UPDATE.APP from update_sd_preload folder
FLASH FILE 7: Special downgrade file in *.skf format that fits to your actual model, phone's firmware version and customization version. We prepared it in step 3."
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Old 06-11-2022, 10:21   #7 (permalink)
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U dont need downgrade button, select all flash files and write button, if files are ok and match to phone all be ok.
In some cases need reflash in upgrade mode after write in com1
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Old 06-11-2022, 10:43   #8 (permalink)
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Quote:
Originally Posted by kikas112 View Post
U dont need downgrade button, select all flash files and write button, if files are ok and match to phone all be ok.
In some cases need reflash in upgrade mode after write in com1
Write button is also gray
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Old 06-11-2022, 11:33   #9 (permalink)
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Write button is also gray
Sorry, Write buttom was active, but it is risky, so I wanted to use Enable Downgrade option, but it was not active without .skf downgrade file.
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Old 06-11-2022, 11:51   #10 (permalink)
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SOLVED!
I had another P Smart 2021 that needed to be downgraded. Used write button in SigmaKey, and downgraded successefully! Thanks.
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