Below is a "Useful Paper" style guide to help you safely manage the installation of Plants vs. Zombies , specifically addressing how to handle unofficial versions if you choose to proceed.
Because version 6.1.11 is an older build, it is typically installed via an on Android devices. It is important to note that official support for this version is limited, as the game has since been updated to newer "Free-to-Play" models by Electronic Arts (EA). Installation Steps for Android plants vs zombies 6111 install