I believe that not all mobile phone users love to chase new ones, or some users will keep using old mobile phones until they are completely broken or unusable. If you are an old iPhone user, and WhatsApp is your daily communication platform, you should consider which new phone to replace in the next 5 months.
Two old iPhones are no longer supported
The website WABetaInfo reported that WhatsApp warned some users that it would stop supporting iOS 10 and iOS 11 iPhones following October 24 this year. At present, only the iPhone 5 and iPhone 5c are still using the above two system versions, so users of the two iPhones need to consider switching. The iPhone 5s, iPhone 6 and iPhone 6s use iOS 12 and are still supported by WhatsApp.
Android 4.1 is the minimum requirement
In fact, in the support center of the WhatsApp official website, it has been stated that the program requires iOS 12 or above to work. For Android phone users, WhatsApp maintains support for Android 4.1 Jelly Bean or above.
source:9to5mac