WhatsApp for Xiaomi

First update WhatsApp through the Play Store, since older builds can crash on HyperOS. If it still fails, back up your chats first via WhatsApp > Settings > Chats > Chat backup, then go to Settings > Apps > Manage apps > WhatsApp > Clear data and reinstall the latest version. A corrupted cache after a HyperOS update is the usual cause. See how others solved this on Reddit

Crashes are usually caused by an outdated app build or a corrupted cache. First update WhatsApp from the Play Store, then go to Settings > Apps > Manage apps > WhatsApp > Clear data and tap only 'Clear cache' (avoid 'Clear data', which logs you out and can remove local chats). If it still crashes, back up your chats via WhatsApp Settings > Chats > Chat backup, then uninstall and reinstall WhatsApp from the Play Store. See how others solved this on Reddit

HyperOS aggressively kills background apps to save battery, which blocks WhatsApp's call signaling so calls only appear once you open the app. Go to Settings > Apps > Manage apps > WhatsApp and set Battery saver to "No restrictions," then enable Autostart on the same screen. Next open Settings > Apps > Manage apps > WhatsApp > Other permissions and turn on "Display pop-up windows while running in the background." After this, incoming calls ring even when the app is closed. See how others solved this on Reddit

This happens when HyperOS holds a duplicate or stale contact set, so WhatsApp matches numbers to the wrong names. Go to Settings > Apps > Manage apps > WhatsApp > Permissions and confirm Contacts is allowed, then open the Contacts app > menu > Settings and use Merge duplicate contacts to clean up duplicates. Also make sure only one account (Google or Mi) is set as the default for new contacts so there's one consistent source. After cleaning it up, force-stop WhatsApp (Settings > Apps > Manage apps > WhatsApp > Force stop) and reopen it so it re-reads the corrected address book. See how others solved this on Reddit

HyperOS/MIUI aggressively kills background apps to save battery, which silences WhatsApp until you open it. Go to Settings > Apps > Manage apps > WhatsApp > Battery saver and set it to No restrictions, then enable Autostart for WhatsApp on the same screen. Also lock WhatsApp in Recents by opening the multitask view, swiping down on the WhatsApp card (or long-pressing it), and tapping the lock icon so the system stops clearing it. See how others solved this on Reddit

HyperOS aggressively kills background apps to save battery, which stops WhatsApp from syncing until you open it. Open Settings > Apps > Manage apps > WhatsApp and turn on Autostart, then tap Battery saver and set it to 'No restrictions'. Also lock WhatsApp in the Recents screen (open Recents, swipe down on the WhatsApp card and tap the lock icon) so the system stops clearing it from memory. See how others solved this on Reddit

A HyperOS/MIUI gallery update can break the media scan so WhatsApp images stop appearing in the Gallery app. In WhatsApp open Settings > Chats and turn on Media visibility, then go to Settings > Apps > Manage apps > Gallery, clear its cache, and reboot the phone to force a fresh media re-scan. If they still don't appear, confirm there's no .nomedia file in the WhatsApp media folder and that WhatsApp has the Files and media (storage) permission granted under Settings > Apps > Manage apps > WhatsApp > Permissions. See how others solved this on Reddit

This usually happens when media visibility is turned off or WhatsApp lacks storage permission after an update. In WhatsApp open Settings > Chats and enable 'Media visibility'. Then open the phone's Settings > Apps > Manage apps > WhatsApp > Permissions, tap 'Files and media' and choose 'Allow management of all files'. Reboot the phone so the Gallery's media scanner re-indexes the WhatsApp Images and Video folders in internal storage. See how others solved this on Reddit

This is usually a contacts-sync conflict where Mi Cloud and Google are both syncing your address book, creating duplicate or merged entries that scramble the names WhatsApp pulls in. Go to Settings > Accounts & sync, open Xiaomi Cloud (Mi Cloud) and turn off Contacts sync so Google is your single source. Then open the Contacts app > Settings > Organize contacts (or Merge duplicates) to clean up duplicates. Finally, go to Settings > Apps > Manage apps > WhatsApp > Force stop, reopen WhatsApp, and let it re-read the address book. If names are still wrong, use Clear cache (not Clear data) on that same WhatsApp screen. See how others solved this on Reddit

HyperOS battery management is killing WhatsApp's background process, so the full-screen call screen never appears. Go to Settings > Apps > Manage apps > WhatsApp > Battery saver and set it to No restrictions. Then, in the same WhatsApp app-info page, open Autostart and turn it on, and open Other permissions > Display pop-up windows while running in the background and allow it. Finally make sure Calls notifications are enabled under Notifications in WhatsApp's app info. See how others solved this on Reddit