自动备份 发表于 2018-10-7 21:31:46

将您的手机从官方的Android Pie降级到2018年的Android8.1

This doesn't require unlocked bootloader
I was having issues with android pie like i was not able to make carrier video calls etc. due to google duo integration into phone app.
So i needed to downgrade my phone from pie to earlier version of android oreo (before july 2018 security update)

Here is how i did it

Download Rollback WW 2.13B Android 8.1 April 2018 (B2N-213B-0-00WW-B05-update.zip)
https://www.androidfilehost.com/?fid=890278863836296092
credit @edwaine
Copy the downloaded file to your sd card and save it where u can easily access it.

Enable usb debugging
download adb drivers
Try installing it if its shows timestamp error and downgrading not possible then follow the instructions below:-

For going into fastboot mode, either press Power+Volume down or type adb reboot bootloader
credit: @grubber24


First check active slot, by
going to fastboot mode and type fastboot getvar current-slot

Then change your active slot, type fastboot --set-active=a or fastboot --set-active=b according to your current slot.


Then go to recovery mode by pressing volume up+ power button
select sideload from sd card . Install the ota file downloaded from the first link. Restart your phone.

it will take some time to load for first time. But it will work


PS: Do a fresh install. I wiped all the data to factory mode then installed the OTA and i have successfully downgraded from Pie to oreo april 2018. See screenshot attached.

Hope it will help you.
Kindly confirm if it works for you too.






转自：XDA
原文地址

门卷一被子 发表于 2018-10-7 21:55:20

万能213B

度盘：链接: https://pan.baidu.com/s/12-6wow3_cD35esndgoQjOA 提取码: r92z

AndrodFileHost:
https://www.androidfilehost.com/?fid=1322778262904009092

Google Drive:
https://drive.google.com/file/d/1RJr4Qm0rvm-gxTrU8tHRnDpMITEgNvdT/view?usp=sharing

希望nokia发现的越晚越好

沃8G 发表于 2018-10-7 22:49:06

谢谢分享！我就是来看看！顺便支持楼主发帖！楼主您发帖辛苦了！

1696315710 发表于 2018-10-7 22:52:43

感谢分享教程

hpc19951210 发表于 2018-10-8 07:06:33

好累楼主发帖

dxfjh 发表于 2018-10-8 12:36:46

自从回锁以后，升级后国行版装不了国际版安卓普pie

索马里 发表于 2018-10-18 19:38:58

谢谢分享！我就是来看看！顺便支持楼主发帖！楼主您发帖辛苦了！

slen 发表于 2019-9-15 20:18:28

你好 可以通过874从P降级吗？

拓展林HX 发表于 2019-9-16 15:34:30

slen 发表于 2019-9-15 20:18
你好 可以通过874从P降级吗？

339b后的版本之下213B.B05已无效

slen 发表于 2019-9-16 16:11:24

门卷一被子 发表于 2019-9-16 15:34
339b后的版本之下213B.B05已无效

有没有这个全量包的链接？

拓展林HX 发表于 2019-9-16 18:00:06

slen 发表于 2019-9-16 16:11
有没有这个全量包的链接？
这个帖子2楼能下载，我已经说了339b版本后 213B.B05已无效，毫无意义


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