The alerts advise users to upgrade their devices or operating systems to continue accessing the messaging platform.
The decision is part of WhatsApp’s ongoing efforts to improve performance and strengthen security across its service.
Older operating systems often lack support for newer features and security updates, making them more vulnerable to bugs, glitches and potential cyber threats.
By phasing out support for outdated Android versions, WhatsApp aims to streamline its operations and ensure that the majority of its users can access newer features without limitations.
The company regularly reviews which devices and software versions it supports, typically discontinuing those that no longer receive updates or have a shrinking user base.
For users still running Android 5.0 or 5.1, the change could significantly impact their ability to communicate through one of the world’s most widely used messaging platforms.
Once support is withdrawn, the app may stop functioning entirely or fail to receive updates, eventually locking users out of their accounts.
To avoid disruptions, affected users are encouraged to check their device settings to confirm their current Android version.
Those unable to upgrade their operating system may need to consider switching to newer smartphones that meet the minimum requirements.
The move highlights the broader trend in the technology industry, where companies gradually phase out support for older systems to maintain efficiency and security.
While such decisions can inconvenience users with older devices, they are often necessary to keep up with evolving technological standards and emerging security risks.