Hi everyone, come and see me again but I don’t know what I will share with everyone today
Suddenly, yesterday my team had an upgrade of the test machine, but I couldn’t remember who upgraded it. The whole team is bewildered because of how to upgrade the version, how to test, suddenly there is a brother sharing how to lower the version on Android. I found it quite easy again, so now I will share it with you, if you are confused, there will be measures to resolve immediately. There is a small note that this method is only used to downgrade version of the Android device, everyone, if you apply to lower the iOS version, it is =))
My two previous devices were Huawei version 9, and I need to downgrade to 8.2.
Let’s start now !!!
You need to install the following software: https://consumer.huawei.com/en/support/hisuite/
If your device is a samsung or oppo device … then you will have to install other software … In this article, I will show you how to lower ver on Huawei. 
After installing the software on, you turn it on and plug the cord between the computer and phone
On Huawei device, go to Setting -> Search keyword HDB -> Select Allow HiSuite to use HDB -> Tap on Allow Allow HiSuite to use HDB
On the software, tap the Button ON on the popup
After this step, HiSuite is also installed on your phone. Turn on HiSuite installed on your phone, select next -> agree -> allow (5 times) and enter the code shown in the box below
Continue to select Restore in this image and select OK
The download and installation process will take a long time, after that your phone will be reset and wait until it boots up to show the new version of 8.2 that you want, hi
To use HiSuite to download the version of the device is quite easy and simple, right? If you have done it once, I guarantee the next time you will be very confident to lower the version of the device when you accidentally upgrade =))
I wish you happy Valentine’s Day 