WhatsApp for Xperia 5 IV

Callers often report you sound muffled or distant on WhatsApp even though regular phone calls are fine. First confirm the hardware is OK by recording a clip in the Recorder app and listening back. Then make sure WhatsApp has clean mic access in Settings > Apps > WhatsApp > Permissions > Microphone (set to Allow), and gently clean the small bottom mic hole next to the USB-C port, since lint there muffles the sound. If it persists, try toggling Bluetooth off (a connected accessory can route the mic away) and reinstall WhatsApp to rule out a corrupt install. See how others solved this on Reddit

This usually happens when battery optimization suspends WhatsApp mid-call or another app is holding the microphone. Go to Settings > Apps > WhatsApp > App battery usage and set it to Unrestricted so it isn't throttled. Turn off STAMINA mode under Settings > Battery while on calls, and close any app that uses the mic in the background (a voice recorder, Assistant, or another video/voice app). Re-granting the microphone permission under Settings > Apps > WhatsApp > Permissions also clears the glitch for many users. See how others solved this on Reddit

Start by clearing the app's temporary cache: Settings > Apps > WhatsApp > Storage & cache > Clear cache (this keeps your chats and is safe). If it still closes, update WhatsApp from the Google Play Store and update Android System WebView and Google Play services as well, since an outdated WebView is a common crash trigger on Xperia devices. As a last resort, back up your chats in WhatsApp > Settings > Chats > Chat backup, then reinstall the app. See how others solved this on Reddit

WhatsApp saves received media to its own folder, and Sony's Album app may not show it until media visibility is enabled. In WhatsApp go to Settings > Chats and turn on Media visibility so newly received photos appear in your gallery. To make a specific chat's media save, open the chat > tap the contact name > Media visibility > On. Photos already received can be browsed with a file manager under Internal storage/Android/media/com.whatsapp/WhatsApp/Media/WhatsApp Images. See how others solved this on Reddit

Yes. WhatsApp now supports a second account natively: open WhatsApp > Settings, tap the arrow/chevron next to your name at the top, choose Add account, and register your second number (you need a second SIM or eSIM, or another way to receive the verification code). This is more reliable than app-cloning workarounds, since the Xperia 5 IV's stock software does not include a built-in dual-app cloning feature. See how others solved this on Reddit

WhatsApp's built-in camera uses a basic capture path that ignores Sony's image processing, so shots come out soft and noisy, and WhatsApp then compresses them further. For anything that matters, shoot with the stock Camera app first, then attach the image via the paperclip/gallery icon in the chat. Also set WhatsApp > Settings > Storage and data > Media upload quality to HD to cut down on the heavy compression. See how others solved this on Reddit