How to Add Another iCloud Account to iPhone 6 Without Knowing the Password of the Existing Account

Adding another iCloud account to your iPhone 6 without knowing the password of the existing account can be tricky, but it is possible to do so. Below are the steps you can take to achieve this:

1. Go to Settings on your iPhone and click on iCloud.
2. Scroll down and click on 'Sign Out' to log out of the existing iCloud account.
3. Enter the Apple ID of the new iCloud account that you want to add.
4. If it asks for a password, simply click on 'Forgot Apple ID or Password'.
5. Follow the instructions to reset the password for the new iCloud account.
6. Proceed with setting up the new account and choose the data to sync with the iPhone.

By following these steps, you can add another iCloud account to your iPhone 6 even if you don't know the password of the existing account. Make sure to keep the new password secure to avoid any future login issues.