If you are using WhatsApp on the old iPhone, then there is bad news for you. Because WhatsApp will stop working on these phones in the coming few days. WhatsApp will no longer work on iPhones that have iOS 9.
WABetaInfo has said in a report that the WhatsApp update is being discontinued in iPhones with iOS 9 OS. This has been confirmed with the beta version 2.21.50 of WhatsApp. Users of this beta version are unable to use WhatsApp on their iOS 9 iPhone, although WhatsApp has not yet provided an update on its FAQ page.
This simply means that from now on WhatsApp will not work in the iPhone 4 and iPhone 4s. Apart from this, if the iPhone 5, 5s and 5c users have not updated their phones, then the new version of WhatsApp will not work on their phones as well.
WhatsApp comes with some features to improve its platform from time to time and now WhatsApp is going to bring another feature which includes Live Chat. The company is also working on changing the user interface of the app. All notifications of archive chat will also be muted.
WhatsApp is also working on multi-division support, after the update, you will be able to access the same account on multiple devices simultaneously.