According to WhatsApp, it will no longer support Android phones running OS 4.0.4 and older, and Apple iPhones running iOS 9 or older. In other words, only users with phones supporting Android OS 4.1 and above and iOS 10 and above will be able to use the messaging app. Further, WhatsApp will only run on KaiOS devices running on KaiOS version 2.5. 1 or above starting November 2021, which means JioPhone and JioPhone 2 users can continue to use the app. Additionally, those using devices that does not support the newer version of iOS, Android or KaiOS will need to upgrade to a new device to continue using WhatsApp after November 1, 2021. The following smartphones will not be supported by WhatsApp from November 1: Apple iPhone 6S, iPhone 6S Plus, and Apple iPhone SE. Samsung Samsung Galaxy Trend Lite, Galaxy SII, Galaxy Trend II, Galaxy S3 mini, Galaxy Core, Galaxy Xcover 2, and Galaxy Ace 2. LG LG Lucid 2, Optimus L5 Dual, Optimus L4 II Dual, Optimus F3Q, Optimus F7, Optimus F5, Optimus L3 II Dual, Optimus F5, Optimus L5, Optimus L5 II, Optimus L3 II, Optimus L7, Optimus L7 II Dual, Optimus L7 II, Optimus F6, Enact, Optimus F3, Optimus L4 II, Optimus L2 II, Optimus Nitro HD and 4X HD. ZTE ZTE Grand S Flex, Grand X Quad V987, ZTE V956, and Grand Memo. Huawei Huawei Ascend G740, Ascend D Quad XL, Ascend Mate, Ascend P1 S, Ascend D2, and Ascend D1 Quad XL. In order to check your Android version, you can head over to Settings > About Phone. Tap on it to open its sub-sections and search for the ‘Android Version’ option. For iOS devices, one can go to Settings > General > About > Software Version.
