To use WhatsApp reliably and securely, you need a device running at least Android 5.0 Lollipop
Many iconic phones are stuck on Android 4.2.2 or 4.4 and can no longer access WhatsApp: Galaxy S3, Galaxy S4 Mini, Galaxy Note 2 Moto G (1st Gen), Moto E (2014) Optimus L7 II, Optimus G Xperia M, Xperia Z What Should You Do? android 4.2 2 jelly bean whatsapp