WhatsApp for Samsung Galaxy Fold

WhatsApp sometimes locks itself to a phone-sized aspect ratio on the big screen, leaving black bars on the sides. Go to Settings > Display > Full screen apps, find WhatsApp and make sure it's toggled on. On some One UI versions the related control is under Settings > Advanced features > Labs (App continuity / aspect ratio). After changing it, fully close and reopen WhatsApp on the unfolded screen. If it still won't stretch, force-stop it via Settings > Apps > WhatsApp > Force stop and relaunch. See how others solved this on Reddit

This is usually battery optimization killing WhatsApp in the background, often after a One UI update. Go to Settings > Apps > WhatsApp > Battery and set it to Unrestricted, then in Settings > Notifications confirm WhatsApp and all its categories are toggled on. Also open WhatsApp > Settings > Notifications to verify they're enabled there; toggling system notifications off and back on once often re-registers them with the phone. See how others solved this on Reddit

On the Fold 7 this is often a rendering glitch made worse by a stale cache. First update WhatsApp to the latest version from the Play Store, then clear its cache via Settings > Apps > WhatsApp > Storage > Clear cache (do NOT clear data, that wipes chats). If photos still won't display, check Settings > Apps > WhatsApp > Permissions and confirm Photos/media access is allowed, then restart the phone. See how others solved this on Reddit

Yes, but it has to be done during the Fold's initial setup (or after a factory reset), because the iOS-to-Android chat transfer can't be triggered later. Connect the two phones with a USB-C to Lightning cable and run Samsung Smart Switch on the Fold. When prompted, install the 'Move to Android' app on the iPhone and scan the QR code that WhatsApp shows to transfer chats and media. Your iPhone WhatsApp must use the same phone number you'll verify on the Fold afterward. See how others solved this on Reddit

This usually happens when the microphone permission gets revoked or audio routing gets confused after folding and unfolding. Go to Settings > Apps > WhatsApp > Permissions and make sure Microphone is allowed, then clear the cache under Settings > Apps > WhatsApp > Storage. If playback is silent, confirm no Bluetooth device is grabbing the audio, then restart the phone to re-initialize the audio path. See how others solved this on Reddit

Quick-reply needs the notification content to be visible on the lock screen. Go to Settings > Notifications > Lock screen notifications (on some versions it's under Settings > Lock screen > Notifications) and set it to Show content rather than Hide content, then make sure WhatsApp notifications are enabled under Settings > Apps > WhatsApp > Notifications. With both on, the lock-screen notification will expand with a reply field so you can type without unlocking. See how others solved this on Reddit