WhatsApp will soon stop working on these devices, see if yours is on the list

The operating systems that have already stopped supporting WhatsApp are:
-- Android versions older than 2.3.3

-- Windows Phone 8.0 and older

-- iPhone 3GS/iOS 6

-- Nokia Symbian S60

-- BlackBerry OS and BlackBerry 10

The operating systems that are set to lose the support by this year are:

-- Nokia S40 until December 31, 2018

-- Android versions 2.3.7 and older until February 1, 2020

-- iOS 7 and older until February 1, 2020

WhatsApp suggests you to upgrade to a newer version or to one of these:

-- Android running OS 4.0 and above

-- iPhone running iOS 8 and above

--Windows Phone 8.1 and above.

Thanks