I have Samsung Galaxy S+ (i9001) and the other day had a prompt from WhatsApp to update the app.
The update download but the installation fails and the app cannot be opened.
I tried downloading the APK of the latest version and even many of older versions but the issue is still there.
I know WhatsApp said they are ceasing support for Android 2.1 and 2.2, but my phone has 2.3.6, so it shouldn't be affected.
How to fix?