WhatsApp for Oppo Reno 10

ColorOS aggressively closes background apps to save power, which stops incoming call alerts from waking the screen. Open Settings > Battery > App battery usage (or Power saver), find WhatsApp, and set it to allow background activity / disable optimization. Then go to Settings > Apps & notifications > WhatsApp > Notifications and enable lock-screen notifications and floating/banner notifications. Finally, open Recent Apps, swipe down on the WhatsApp card (or tap the menu) and lock it so the system stops clearing it. See how others solved this on Reddit

Delayed messages are almost always ColorOS power management putting WhatsApp to sleep in the background. Open Settings > Battery > App battery usage, select WhatsApp, and turn off any sleep/optimization restriction while enabling background activity and auto-launch (Settings > Apps > Auto-launch). Then in Settings > Notifications & status bar, confirm WhatsApp notifications, sound, and banners are all enabled. Keeping the app excluded from battery optimization is what restores real-time delivery. See how others solved this on Reddit

This is usually a network or data-restriction issue rather than the apps. Go to Settings > Apps > WhatsApp > Mobile data & Wi-Fi (Data usage) and enable Background data and Unrestricted data usage, then test on both Wi-Fi and mobile data to isolate where it fails. If it continues, clear the WhatsApp cache under Settings > Apps > WhatsApp > Storage and restart your router, since an unstable connection is the most common cause of call and video freezing. See how others solved this on Reddit

When the chat list stops re-sorting after a sent or received message, it's typically a cached UI glitch in the app. Force stop WhatsApp via Settings > Apps > WhatsApp > Force stop, then clear its cache under Storage (cache only, not data) and reopen it. Also update to the newest WhatsApp version from the Play Store, since this sorting bug has been addressed in recent updates. See how others solved this on Reddit

WhatsApp's official iOS-to-Android transfer uses a USB-C cable and only runs during the Reno 10's initial setup. On a fresh phone, connect the iPhone with a cable and follow the on-screen Move to Android / Clone Phone prompts, then sign in to WhatsApp with the same number and accept the import when asked. If the phone is already set up, you'll need to factory reset to trigger the migration, because a Google Drive backup cannot restore an iCloud WhatsApp backup. See how others solved this on Reddit

A doubled name is almost always caused by the contact being saved more than once on your phone, so Android shows both the saved name and WhatsApp's profile name. Open Contacts, search the person, and merge or delete the duplicate entry (Contacts > the contact > menu > Link/Merge). If the duplicate persists, clear the WhatsApp cache under Settings > Apps > WhatsApp > Storage and update WhatsApp from the Play Store, which clears the stale notification display. See how others solved this on Reddit