WhatsApp for OnePlus 5T

A blank white screen usually means a corrupted app cache or an outdated build of WhatsApp on OxygenOS. Go to Settings > Apps > WhatsApp > Storage and tap Clear cache (not Clear data, which would erase your chats), then update WhatsApp from the Play Store. If it persists, uninstall and reinstall WhatsApp and restore your chats from the Google Drive backup during setup. See how others solved this on Reddit

Choppy video playback inside WhatsApp on the 5T is typically a hardware-decoding issue, and it shows up most on custom ROMs like LineageOS where the codec/vendor libraries differ from stock OxygenOS. On a custom ROM, make sure you flashed the matching firmware and vendor blobs for 'dumpling', since mismatched blobs are the usual cause of broken hardware-accelerated decoding. On stock OxygenOS, clear WhatsApp's cache (Settings > Apps > WhatsApp > Storage > Clear cache) and update both WhatsApp and the OS; if you previously enabled Developer options like 'Disable HW overlays', turn that back off as it can force slower software rendering. See how others solved this on Reddit

OnePlus Gaming Mode only silences notifications when its notification-blocking option is actually switched on, and call notifications can still slip through. Open Settings > Utilities > Gaming Mode (or Game Space) and enable 'Block notifications' or 'Notifications as text' so banners are suppressed during play. For full silence, also turn on Do Not Disturb from Quick Settings, since WhatsApp calls can otherwise still ring through. See how others solved this on Reddit

OxygenOS aggressively closes background apps to save battery, which delays WhatsApp's push notifications until you open the app. Go to Settings > Apps > WhatsApp > Battery and set it to 'Don't optimize', and in the Recent apps screen lock WhatsApp so it isn't cleared. Also confirm notifications are fully enabled under Settings > Apps > WhatsApp > Notifications and that Battery Saver isn't restricting background data. See how others solved this on Reddit

OxygenOS on the 5T does not offer built-in WhatsApp call recording, because Android blocks apps from capturing another app's call audio directly. The practical workaround is the built-in screen recorder (swipe down to Quick Settings > Screen recorder) with internal audio enabled, though on older OxygenOS builds it may only capture mic audio. There is no native WhatsApp call-recording feature, so for reliable two-way recording you generally need a third-party recorder app or speakerphone. See how others solved this on Reddit

OxygenOS routes a tapped number to the dialer, not WhatsApp, because WhatsApp calls are handled inside the app rather than as a system default. To call someone via WhatsApp, open the contact in WhatsApp and use the call icon, or save the number to a contact so the 'WhatsApp call' option appears in your Contacts app. There is no OxygenOS setting to make WhatsApp the default phone handler, but adding contacts through WhatsApp gives you one-tap WhatsApp calling. See how others solved this on Reddit