WhatsApp for Nord 2

OxygenOS aggressively closes background apps to save battery, which delays delivery until WhatsApp is reopened. Go to Settings > Apps > App management > WhatsApp > Battery usage and set it to "Don't optimize" (allow background activity). Then open Recent Apps, find the WhatsApp card, and tap the lock icon (or pull the card down) so the system won't clear it from memory. Together these keep WhatsApp's background connection alive for push notifications. See how others solved this on Reddit

This is usually battery optimization combined with a disabled notification channel. Open Settings > Apps > App management > WhatsApp > Notifications and make sure notifications and the individual Messages and Groups channels are all enabled with sound, then set Battery usage to "Don't optimize." Inside WhatsApp, go to Settings > Notifications and turn on "Use high priority notifications." Reboot once after changing these so the settings take effect. See how others solved this on Reddit

WhatsApp uses its own in-app camera that doesn't always match the Nord 2's sensor, so the preview can look cropped or off-center. The reliable workaround is to skip the in-app camera: in a chat tap the attach icon and choose Gallery, or take the shot with the system Camera app and share it into WhatsApp afterward. Make sure WhatsApp is updated from the Play Store too, since these alignment bugs are often fixed in newer builds. See how others solved this on Reddit

The black screen comes from the proximity sensor near the top of the display, which thinks the phone is at your ear and blanks the screen to route audio to the earpiece. To listen on speaker, keep your hand and any covering away from the top of the screen, or play the voice note with the screen facing away from you. If it triggers constantly even when nothing is near the sensor, remove any screen protector covering the top bezel and clean that area, as a protector or dirt is the most common cause. See how others solved this on Reddit

Received images sometimes arrive without timestamp metadata, so the gallery falls back to the Unix epoch (1 January 1970) and sorts them oddly. Clear the gallery cache via Settings > Apps > App management > your gallery app > Storage > Clear cache, then reopen it so it re-reads the WhatsApp Images folder. Keeping WhatsApp updated from the Play Store helps, since the metadata handling has been improved in newer versions. See how others solved this on Reddit

OxygenOS blocks the full-screen incoming-call UI unless WhatsApp is allowed to draw over other apps. Go to Settings > Apps > Special app access > Display over other apps and enable it for WhatsApp. Then under Settings > Apps > App management > WhatsApp > Notifications, open the Calls channel and make sure it is allowed to pop on screen. Finally set WhatsApp's Battery usage to "Don't optimize" so it can wake the display when a call arrives. See how others solved this on Reddit