WhatsApp for Realme 10 Pro+

ColorOS aggressively kills background apps to save battery, which stops WhatsApp from delivering pushes until you open it. Go to Settings > Battery > App battery management, find WhatsApp and turn off Optimize / set it to Allow background activity (turn off Sleep standby optimisation if shown). Next open Settings > Apps > App management > WhatsApp > and enable Allow auto-launch and Allow associated launch. Finally, open the Recent Apps tray, pull down on the WhatsApp card and tap the lock icon so the system stops clearing it. See how others solved this on Reddit

This is ColorOS holding WhatsApp's connection asleep and only waking it on unlock, so queued messages land late. In Settings > Apps > App management > WhatsApp enable Allow auto-launch, and under Notifications make sure every WhatsApp channel is on with banners and sound enabled. Then in Settings > Battery > App battery management set WhatsApp to Allow background activity (don't optimize) so it keeps a live connection while the screen is off. See how others solved this on Reddit

Cross-phone restore works through Google Drive, so the new device must use the exact same phone number and the same Google account that holds the backup. On your old phone open WhatsApp > Settings > Chats > Chat backup and run a fresh Google Drive backup, then on the Realme 10 Pro+ install WhatsApp from the Play Store, verify the same number, and tap Restore when prompted. If no backup is found, confirm both phones are signed into the matching Google account in Settings > Users & accounts. See how others solved this on Reddit

An Android-to-Android restore only pulls from Google Drive, and the backup won't appear if it was saved under a different Google account. Sign the phone into the original Google account in Settings > Users & accounts, then reinstall WhatsApp and re-verify your number so the Restore screen finds the Drive backup. If you only have a local file, use a file manager to copy the Databases folder (Android/media/com.whatsapp/WhatsApp/Databases on current versions) onto the new phone before reinstalling so WhatsApp can detect the latest .crypt file; note local backups only cover roughly the last week. See how others solved this on Reddit

ColorOS needs explicit permission to draw the call screen over the lock screen, otherwise the call only arrives as a silent notification. Go to Settings > Apps > App management > WhatsApp and enable Display over other apps (Floating window) and Allow notifications on the lock screen, then under App permissions grant the Phone permission. Finally, in Settings > Battery > App battery management set WhatsApp to Allow background activity so it isn't frozen when a call comes in. See how others solved this on Reddit

The screen blanks because the proximity sensor stays triggered after you move the phone away from your ear, so ColorOS keeps the display off. Wipe the area around the earpiece and remove any thick screen protector covering the sensor, since dirt or a cover is the usual cause. If it persists, test the sensor with a call and, as a workaround, press the power button to wake the screen back up. Turning off WhatsApp's in-call screen behavior won't help, so the fix is keeping the sensor area clean and, if it's faulty, having it serviced. See how others solved this on Reddit