If you wish to migrate your data to GBWhatsApp from an existing WhatsApp account, ensure you've taken a backup. If you're creating a new account in GBWhatsApp or don't need your previous data, you can skip this step.
Enable "Unknown Sources" to allow the installation of apps not sourced from Google Play. This setting can be located in the "Security and Privacy" section within your device's "Settings."
Locate the downloaded GBWhatsApp APK, typically found in the "Downloads" folder on your phone's internal memory or on the SD card. Simply tap on the downloaded GBWhatsApp APK in this folder, and the installation process will commence. In less than 15 seconds, you'll be ready to activate the application with your number and start using it.