WhatsApp for iPhone 8 Plus

Your iPhone 8 Plus is fine for now. WhatsApp is dropping support for iPhones stuck on iOS 15.0 or older, but the 8 Plus can update all the way to iOS 16.7.x, which stays above that cutoff. Make sure you've installed the latest available iOS under Settings > General > Software Update so you don't fall below the minimum. See how others solved this on Reddit

WhatsApp's announced floor is iOS 15.1, and your iPhone 8 Plus supports iOS 16.7, so you meet the requirement with room to spare. Open the App Store, tap your profile icon at the top right, and check whether WhatsApp shows an Update button so you stay on the latest supported build. As long as you keep both iOS and the app reasonably current, you'll keep receiving updates. See how others solved this on Reddit

If the update downloaded but won't apply, first free up storage under Settings > General > iPhone Storage, since the installer needs several GB of headroom. Then delete the stuck download (tap the iOS update in that storage list and choose Delete Update) and re-download it. Reboot the phone, make sure it's on Wi-Fi and charging, and retry from Settings > General > Software Update. If it still fails, plug into a Mac or PC and update via Finder or iTunes, which often pushes through installs the over-the-air method chokes on. See how others solved this on Reddit

On iOS 16.7, your iPhone 8 Plus should keep running WhatsApp into 2026, since the announced cutoffs target iOS 15 and below. The bigger limit is that this model can't go past iOS 16.7.x and Apple is winding down security patches for it, so install the final 16.7.x release and watch for WhatsApp's in-app warnings about an approaching minimum version. When WhatsApp eventually raises the floor past iOS 16, that's your real signal it's time to consider a newer phone. See how others solved this on Reddit

Start with the basics: force-close WhatsApp by swiping it away in the App Switcher, toggle Airplane mode off and on, and reboot the iPhone. Then update WhatsApp from the App Store and confirm you're on the latest iOS 16.7.x via Settings > General > Software Update, since an outdated app or OS is the usual cause of connection failures on older iPhones. If it persists, offload and reinstall the app under Settings > General > iPhone Storage > WhatsApp; your chats restore from your iCloud or local backup when you sign back in. See how others solved this on Reddit

There's no safe sideload trick on iPhone, and forcing an outdated WhatsApp build won't connect, so the real fix is updating properly. First make sure your iPhone 8 Plus is on iOS 16.7 via Settings > General > Software Update, then install the current WhatsApp from the App Store via your profile icon. If you can't get the very latest app because the device is capped at iOS 16, the App Store may prompt to 'Download an older version of this app that's compatible' with this device - accept it, as that's Apple's supported way to keep a working build. See how others solved this on Reddit