Solution:
There are two ways of deleting the device from the Xiaomi account:
Firstly, delete your device in the https://i.mi.com/
1.Access https://i.mi.com/
2.Sign in with My account
3.Once you have accessed the Mi account, click Settings.
4.You may see all devices paired with your Mi Account in My devices.
5.Select the device that we are going to delete and press "Delete device". It will ask us if we really want to deactivate the device and we click delete.
Note: This device will be deleted from your account and will no longer be connected to Xiaomi Cloud. After you delete the device, you will be signed out of your Xiaomi Account on this device.
Secondly, delete your device in the phone
- Click settings in your phone
- Click and log in your Xiaomi Account
- Click Devices, you may see all devices paired with your Xiaomi Account
- Click t the device that we are going to delete and press "Remove". Enter your password and you may delete your device.
Note: After device is removed, it will be signed out of your Xiaomi Account automatically. You won’t be able use this device to access the photos, messages, or other content stored in your account.