stk-l21 android 10 to 9.1 downgrade firmware need help [Answered] - GSM-Forum

Muhammadsaqib11 · 07-28-2021, 16:39

Device info log:

Code:

Device Model: ‪STK-L21‬
DeviceName: ‪STK-L21M‬
System: ‪STK-L21M 10.0.0.405(C185E6R4P1)‬
Android Version: ‪10‬
Base Version: ‪STK-LGRP6-OVS 10.0.0.405‬
Custom Version: ‪STK-L21M-CUST 10.0.0.6(C185)‬
Preload Version: ‪STK-L21-PRELOAD 10.0.0.1(C185R4)‬
C_Version: ‪C185‬
D_Version: ‪D000‬

Connect done.
Performed by ‪1.2.5.3‬ Software version.

i need downgrade firmware because i dont want disasseble my device.

at support this eu firmware available but i need meafnaf reagon
STK-L21A(C432) Downgrade from 10.0.0 tot 9.1.0 for Reset Frp(Octoplus).zip

Muhammadsaqib11 · 07-28-2021, 16:50

Code:

Starting ON/OFF Factory Mode
Selected phone model: ‪STK-L21‬
To Enable Factory mode put the phone in Upgrade mode and connect USB cable!
To Disable Factory mode connect the phone in Factory mode or Factory Fastboot mode!
Checking the existence of the auto firmware file...
Performing ON Factory Mode operation...
Checking firmware package type
Searching device in Upgrade mode...
Detected ‪DBAdapter Reserved Interface‬ port
Connecting to phone..
Phone connect successfully!
Writing firmware partitions...
Initializing remote service connection...
Downloading patch files from the server...
Downloading additional resources...
Writing ‪SHA256RSA‬ partition...
Writing ‪CRC‬ partition...
Writing ‪BASE_VERLIST‬ partition...
Error: Failed write ‪BASE_VERLIST‬ partition
Checking firmware package type
Searching device in Upgrade mode...
Detected ‪DBAdapter Reserved Interface‬ port
Connecting to phone..
Phone connect successfully!
Writing firmware partitions...
Initializing remote service connection...
Downloading patch files from the server...
Writing ‪SHA256RSA‬ partition...
Writing ‪CRC‬ partition...
Writing ‪PACKAGE_TYPE‬ partition...
Error: Failed write ‪PACKAGE_TYPE‬ partition
Warning: Switching your device to Factory Mode is not possible! Please, connect your device via Test Point and perform the desired operation.

ON/OFF Factory Mode failed.
Performed by ‪1.2.5.3‬ Software version.

on/off factory mode is not possible at android 10 i think

usman0000 · 07-28-2021, 17:08

Did you tired with huawei suite that is best way to downgrade firmware also safe

Jorabek-1987 · 07-28-2021, 19:27

https://www.youtube.com/watch?v=0K4G...el=HamadMobile

Octopus support · 07-29-2021, 07:04

Hello.

For what purpose do you need this downgrade?

Explain to us in more detail, we will try to help you.

Muhammadsaqib11 · 07-29-2021, 08:33

Quote:

Originally Posted by usman0000

Did you tired with huawei suite that is best way to downgrade firmware also safe

frp locked.
therefore dont able to do it by huawei suite

Muhammadsaqib11 · 07-29-2021, 08:34

Quote:

Originally Posted by Octopus support

Hello.

For what purpose do you need this downgrade?

Explain to us in more detail, we will try to help you.

phone is frp locked.
i want to bypass or unlock it.

Muhammadsaqib11 · 07-29-2021, 08:38

Quote:

Originally Posted by Jorabek-1987

https://www.youtube.com/watch?v=0K4G...el=HamadMobile

i don't want disassemble it. and factory mode on/off is not working at android 10 i think....

Muhammadsaqib11 · 08-02-2021, 10:15

no downgrade firmware, i have done it yesterday with disassemble (factory mode)
thread close

Octopus support · 08-02-2021, 12:28

Quote:

Originally Posted by Muhammadsaqib11

no downgrade firmware, i have done it yesterday with disassemble (factory mode)
thread close

Please post here full Software log of successful operation, we will check it.

07-28-2021, 16:39	#1 (permalink)
Muhammadsaqib11 No Life Poster Join Date: Jun 2011 Location: pakistan Posts: 2,281 Member: 1602407 Status: Offline Sonork: 100.1648061 Thanks Meter: 360	stk-l21 android 10 to 9.1 downgrade firmware need help [Answered] Device info log: Code: Device Model: ‪STK-L21‬ DeviceName: ‪STK-L21M‬ System: ‪STK-L21M 10.0.0.405(C185E6R4P1)‬ Android Version: ‪10‬ Base Version: ‪STK-LGRP6-OVS 10.0.0.405‬ Custom Version: ‪STK-L21M-CUST 10.0.0.6(C185)‬ Preload Version: ‪STK-L21-PRELOAD 10.0.0.1(C185R4)‬ C_Version: ‪C185‬ D_Version: ‪D000‬ Connect done. Performed by ‪1.2.5.3‬ Software version. i need downgrade firmware because i dont want disasseble my device. at support this eu firmware available but i need meafnaf reagon STK-L21A(C432) Downgrade from 10.0.0 tot 9.1.0 for Reset Frp(Octoplus).zip

07-28-2021, 17:08	#3 (permalink)
usman0000 No Life Poster Join Date: Apr 2005 Location: Pretoria South Africa Age: 45 Posts: 1,271 Member: 132635 Status: Offline Thanks Meter: 360	Did you tired with huawei suite that is best way to downgrade firmware also safe

07-28-2021, 19:27	#4 (permalink)
Jorabek-1987 Freak Poster Join Date: Feb 2017 Location: Uzbekiston Posts: 109 Member: 2684254 Status: Offline Sonork: 1-212-228-9600 Thanks Meter: 64	https://www.youtube.com/watch?v=0K4G...el=HamadMobile

07-29-2021, 07:04	#5 (permalink)
Octopus support Product Supporter Join Date: Jan 2019 Location: USA, New York Posts: 10,163 Member: 2891705 Status: Offline Thanks Meter: 2,142	Hello. For what purpose do you need this downgrade? Explain to us in more detail, we will try to help you.

08-02-2021, 10:15	#9 (permalink)
Muhammadsaqib11 No Life Poster Join Date: Jun 2011 Location: pakistan Posts: 2,281 Member: 1602407 Status: Offline Sonork: 100.1648061 Thanks Meter: 360	no downgrade firmware, i have done it yesterday with disassemble (factory mode) thread close