WhatsApp for Asus ROG Phone 3

This is usually ASUS's aggressive battery management freezing WhatsApp in the background. Go to Settings > Apps > WhatsApp > Battery and set it to Unrestricted, then open the ASUS Mobile Manager app (or Settings > Battery) and add WhatsApp to the auto-start / never-sleep list so it isn't killed. Also clear the WhatsApp cache via Settings > Apps > WhatsApp > Storage > Clear cache (use Clear cache, not Clear data, so you don't lose chats), and confirm you're on the latest WhatsApp version from the Play Store, since outdated builds frequently cause send failures. See how others solved this on Reddit

The ROG Phone 3's side USB-C port supports video output (DisplayPort over USB-C), so you can connect it to a monitor with a USB-C to HDMI/DisplayPort adapter. Note that the AeroActive Cooler is just a fan and does not provide video out. Most phone apps including WhatsApp don't reflow for a large screen, so for messaging on the external display use WhatsApp Web in a browser by visiting web.whatsapp.com and scanning the QR code from WhatsApp > Settings > Linked devices. Keep the phone screen active so touch input still works for apps that lack a desktop layout. See how others solved this on Reddit

Android 10 and later block third-party apps from tapping the call audio stream, so WhatsApp voice and video calls cannot be captured by normal call-recorder apps, and the ROG Phone 3's built-in recorder only works for regular cellular calls. The reliable workaround is to use the system Screen Recorder from the Game Genie or quick settings panel with internal/system audio enabled while on the WhatsApp call, then trim the resulting video afterward. Be aware that recording calls without consent may be restricted by law in your region. See how others solved this on Reddit

Yes. The ROG Phone 3 shipped with Android 10 and received updates up to Android 13, which is well above WhatsApp's current minimum requirement, so WhatsApp keeps working even though ASUS has ended OS updates. Keep updating the WhatsApp app itself through the Play Store, and if Google Play Services warns about an outdated version, update Play Services from the Play Store so messaging and chat backups continue to work. See how others solved this on Reddit

Android Auto reads incoming WhatsApp text messages aloud and lets you reply by voice, but it does not play received voice notes through the car display, so that limitation is expected rather than a fault with your phone. Make sure Android Auto has notification access (open the Android Auto settings on the phone and confirm WhatsApp notifications are enabled), and confirm WhatsApp isn't being frozen by ASUS battery management (Settings > Apps > WhatsApp > Battery > Unrestricted) so its notifications reliably reach the car. See how others solved this on Reddit

Before any root or factory reset, open WhatsApp > Settings > Chats > Chat backup and run a manual backup to Google Drive using the same Google account you'll sign back in with; WhatsApp also writes a local backup to internal storage (Android/media/com.whatsapp/WhatsApp/Databases on current versions, or the WhatsApp/Databases folder on older builds). After flashing or resetting, reinstall WhatsApp from the Play Store, verify the same phone number, and restore from Google Drive when prompted. If Drive restore fails, copy that Databases folder back to the same path before reinstalling so WhatsApp detects the local backup. See how others solved this on Reddit