The main disadvantage of using GB WhatsApp is that it is not an officially authorized application. Therefore, it cannot be downloaded from the Google Play Store and must be obtained from third-party sources, which can be risky and may lead to the user’s device being infected with malware. Additionally, since it is not sanctioned by Google, the user may not have access to any security updates, exposing them to potential vulnerabilities. Also, since the app has access to user contacts and messages, there could be potential privacy issues, as GB WhatsApp could use this data for undisclosed purposes. Finally, since it is not an official application, it might be subject to sudden shutdowns or crashes.