According to the information on WhatsApp FAQ section, WhatsApp will only be compatible with phones running Android 4.0. 3 operating system or newer as well as iPhones running on iOS 9 and newer.

Does WhatsApp work on Android go?

Android 8.1 Go supports many popular Google Play apps, although demanding applications like 3D games are not expected to run well on entry-level smartphones. Netflix, Facebook, WhatsApp, and Uber are all compatible with the OS and its associated devices.

Which Android version will not support WhatsApp?

WhatsApp will no longer work on Android devices running on devices running Android 4.0. 3 or older versions of the operating system. This move by WhatsApp means that the iPhone 4 and earlier models will not be able to access the messaging app from the beginning of next year.