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A5 L18021 Bootloader Cannot Become Unlocked

2019-03-09, 6:36 AM

edited to make more like a question than ranting - mod




I am writing to you regarding the firmware of Lenovo A5 Global version L18021;

By reviewing the code, I am able to see the firmware was built by Qihoo 360 Technology Co. Ltd.


When trying to unlock the Bootloader via ADB, despite having "OEM Unlock" checked in the Developer Menu,

it does not allow. Can you please inform how to fix the bug?



Thank you!


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Re: A5 L18021 Bootloader Cannot Become Unlocked

2019-08-19, 19:20 PM

Hello. Maybe, it can help. I found it on Lenovo K5 Pro forum.


Make backup of your phone, or ALL YOUR DATA WILL BE ERASED! 

In Developer Options turn on USB debugging and OEM unlocking. At first we need to get file named sn.img, and all phones has different types of sn.img!


In the first row we need to enter IMEI 1, in the second row we need to enter serial number, in the third row we need to enter e-mail, in the 4th row we need to enter characters that are displayed. And check the box that says that you will lose the guarantee. I think, if we lock the bootloader, we'll not lose it.. And now we pressing 提交申请 button!



Then we go to entered e-mail and downloading the file (sn.img). Now go to download LR Flash Tool. Recommended to turn off your antivirus, it'll block our program. Link: https://drive.google.com/file/d/11qwYsFtPpLWLc37UL6UrQs6egnsNtiGn/view?usp=drivesdk

Password: 4PDA.RU


Now connect your phone to PC and launch LR Flash Tool.

Make all like in the pictures!





Sorry, my English is bad


That's all. Try it at your own risk. I don't know the result, but it can help

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