Your phone contains your entire digital life. Don't trade your privacy and security for a "free" license key that likely won't work anyway.
Most keygens are "trojan horses" designed to steal your passwords, banking info, or personal data once installed. Tenorshare 4uKey for Android 2.2.1.11 Keygen Free Download
If you only need a basic reset and don’t mind losing data, you can use Google's "Find My Device" to remotely erase the phone, which also removes the screen lock. Your phone contains your entire digital life