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

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Old 01-01-2023, 03:31   #1 (permalink)
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how to downgrade stk-l21 from emui 12 for frp bypass?


The customer does not want to open the phone for test point

Checking fastboot device.....OK
Reading info.....OK
Device Model: STK-L21
Device Firmware: :STK-L21M 12.0.0.225(C185E2R6P1)
Base Firmware: :STK-LGRP10-OVS 102.0.0.225
Custom Firmware: :STK-L21M-CUST 102.0.0.2(C185)
Preload Firmware: :STK-L21M-PRELOAD 102.0.0.1(C185R6)
Device FB Lock: LOCKED
Device USER Lock: LOCKED
Device Lock: locked
Operation {Read info} ID: 1E1DFCF37EB88F54
Elapsed time 00:01 -- Version 4.3.9
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Old 01-01-2023, 09:15   #2 (permalink)
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Quote:
Originally Posted by lingosh View Post
The customer does not want to open the phone for test point

Checking fastboot device.....OK
Reading info.....OK
Device Model: STK-L21
Device Firmware: :STK-L21M 12.0.0.225(C185E2R6P1)
Base Firmware: :STK-LGRP10-OVS 102.0.0.225
Custom Firmware: :STK-L21M-CUST 102.0.0.2(C185)
Preload Firmware: :STK-L21M-PRELOAD 102.0.0.1(C185R6)
Device FB Lock: LOCKED
Device USER Lock: LOCKED
Device Lock: locked
Operation {Read info} ID: 1E1DFCF37EB88F54
Elapsed time 00:01 -- Version 4.3.9
You can try it sir.....
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Old 01-01-2023, 16:07   #3 (permalink)
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Quote:
Originally Posted by easy-team View Post
You can try it sir.....

without any risk and witch version can i use for downgrade
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Old 01-01-2023, 19:54   #4 (permalink)
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Quote:
Originally Posted by lingosh View Post
without any risk and witch version can i use for downgrade
Try this https://www.dmrepairtech.com/2021/04...k-l21.html?m=1
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Old 01-02-2023, 10:41   #5 (permalink)
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Originally Posted by lingosh View Post
without any risk and witch version can i use for downgrade
try test point sir there
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Old 12-09-2023, 11:40   #6 (permalink)
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at this version STK-L21M 12.0.0.231 test point not working!!!
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Old 12-09-2023, 13:21   #7 (permalink)
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at this version STK-L21M 12.0.0.231 test point not working!!!
please send me image problem sir
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Old 12-09-2023, 15:35   #8 (permalink)
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please send me image problem sir

What should I take a picture of?!
I said that the phone with this Security or Build number does not even go to test point or Huawei USB 1.0 mode.
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Old 12-09-2023, 21:07   #9 (permalink)
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Quote:
Originally Posted by PaRaDoX-M View Post
What should I take a picture of?!
I said that the phone with this Security or Build number does not even go to test point or Huawei USB 1.0 mode.
change cable usb and try again





if port huawei USB 1.0 not work then you need modified USB Harmony cable
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Old 12-09-2023, 21:37   #10 (permalink)
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for emui 12 you need modified cable ,you need 10k resistor ,search on youtube emui 12 testpoint
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