The (both the classic 2007 version and the 2020/2024 re-releases) does not officially support WhatsApp .
You're looking for information on how to install WhatsApp on a Nokia 5310. whatsapp nokia 5310 install
The phones run on very basic operating systems (like Series 30+) that do not support standard Android or iOS app files. The (both the classic 2007 version and the