How to remove Huawei P20 Pro Demo Retail Video from playing over and over again.

- November 20, 2018

If you ever bought a Huawei P20 Pro demo phone online and found out later that you couldn't use it because it has a demo video which kept on looping and sucking the battery out of your daily usage.

Here are some tips and tricks for you.

Step 1: Install ADB in your Windows PC / Laptop
(I will not elaborate further on this just google you can get some answers / how to's)

Step 2: Connect your phone to PC and enable USB Debugging
(You will need a couple of tries until you see a pop-up box on the phone asking for your permission to allow your connection to the PC)

Step 3: check if you have ADB access
Open the command prompt and enter the commands below
Make sure you change your directory to the ADB folder 1st.

Step 3.1: Type in "ADB devices -l" at the command prompt without the "
If you successfully connected you will get a prompt showing the device which is connected

Example:
List of devices attached
XXX0000000000000 device product:CLT-L29 model:CLT_L29 device:HWCLT

Step 4: After that go to Settings > Security & Privacy > Device administrators
Disable Retail mode & HwRetailAssistant

Step 5: Go back to ADB command prompt and type this 2 commands to remove the Demo Loop Video
1) "adb shell cmd package uninstall -k --user 0 com.huawei.retaildemo"
2) "adb shell cmd package uninstall -k --user 0 com.huawei.experience.ec"

If you get this error
Failure [DELETE_FAILED_DEVICE_POLICY_MANAGER]
Please refer to step Step 4 again and recheck make sure both of them are listed as "Inactive"

The demo should stop playing for now.

You may want to check out the video below for detailed steps and guide