WhatsApp for Samsung Galaxy S7

The Galaxy S7 shipped with Android 6 and received updates up to Android 8 (Oreo), and WhatsApp's current minimum requirement is Android 5.0, so it still runs fine. Make sure your phone is on its final available build by going to Settings > Software update > Download and install. WhatsApp does periodically retire very old Android versions, but the S7 on Android 8 sits comfortably above the cutoff, so you don't need to worry in the near term. See how others solved this on Reddit

WhatsApp drops support for outdated Android versions over time, but this only affects phones stuck on very old builds (well below the current Android 5.0 minimum); the S7 on Android 7 or 8 is above that line. First confirm your build under Settings > Software update, then update WhatsApp itself in the Play Store, since an outdated app version can trigger a false warning. If you ever do hit a genuine cutoff, back up your chats to Google Drive (WhatsApp > Settings > Chats > Chat backup) beforehand so nothing is lost. See how others solved this on Reddit

WhatsApp Plus is an unofficial modified APK that is not on the Google Play Store, so installing it means sideloading from an outside source and enabling 'Install unknown apps' for your browser under Settings > Apps > Special access > Install unknown apps. It is not recommended: these mods violate WhatsApp's terms and can get your number temporarily or permanently banned, and they carry a real malware risk. Stick to the official WhatsApp from the Play Store on your S7. See how others solved this on Reddit

Crashes and freezes on the S7 are usually fixed by clearing the app's cache under Settings > Apps > WhatsApp > Storage > Clear cache (this won't delete your chats). If it persists, update WhatsApp in the Play Store and restart the phone, since the older S7 software can leave stale processes running. As a last resort, back up your chats in WhatsApp > Settings > Chats > Chat backup, then uninstall and reinstall the app fresh. See how others solved this on Reddit

On older phones, WhatsApp Web drops when Android's battery optimization puts WhatsApp to sleep in the background, cutting the link to your computer. Go to Settings > Apps > WhatsApp > Battery and set it to Unrestricted (or remove WhatsApp from any battery-optimization or power-saving list) so it can stay connected. Also keep the phone online and on Wi-Fi near the computer, since the linked session depends on the phone staying connected. See how others solved this on Reddit

WhatsApp is not pre-installed on the Galaxy S7 or S7 Edge; any social apps bundled by Samsung or your carrier are typically Facebook or Microsoft apps, not WhatsApp. Open the Google Play Store, search for WhatsApp Messenger, tap Install, then verify your phone number to set it up. If a carrier-bundled messaging app is already there, it won't be WhatsApp, so install the official one separately. See how others solved this on Reddit