WhatsApp will be inaccessible to phones in the list below in some hours
WhatsApp will start removing support for some Android, iOS and KaiOS devices running on old OS versions in a few hours from now. These phone include

iPhone SE
iPhone 6S
iPhone 6S Plus
Galaxy Trend Lite
Galaxy Trend II
Galaxy SII
Galaxy S3 mini
Galaxy Xcover 2
Galaxy Core
Galaxy Ace 2
Lucid 2
Optimus F7
Optimus F5
Optimus L3 II Dual