WhatsApp for LG V30

WhatsApp's background syncing is usually the culprit. Open Settings > Apps & notifications > WhatsApp > Battery and set it to optimized (on Pie this is 'Battery optimization'), or enable 'Background restriction' so the system can sleep the app while keeping notifications on. Also go to WhatsApp > Settings > Chats > Chat backup and set backup to a fixed schedule over Wi-Fi only, since constant backup over cellular keeps the radio awake and burns battery. See how others solved this on Reddit

This is almost always proximity-sensor routing: when the sensor thinks the phone is at your ear, audio plays through the quiet earpiece instead of the speaker. Try playing a voice message with the screen uncovered and the phone away from your face, and turn up the media volume. If it still fails, go to Settings > Apps & notifications > WhatsApp > Permissions and confirm Microphone and Storage are allowed, then clear WhatsApp's cache under WhatsApp > Storage. A flaky or dirty proximity sensor (top of the screen) is the common hardware cause if playback only works when the screen is covered. See how others solved this on Reddit

This is Android's Doze/battery optimization freezing the app while the screen is off, so go to Settings > Apps & notifications > WhatsApp > Battery and set it to 'Don't optimize' (Not optimized). Then check Settings > Apps & notifications > WhatsApp > Notifications and make sure the Calls channel is enabled and allowed to override Do Not Disturb, which keeps incoming calls ringing instead of landing silently in the notification shade. See how others solved this on Reddit

You can disable LG's duplicate messaging and bloat without breaking WhatsApp by going to Settings > Apps & notifications > See all apps, then disabling things like LG Messaging (if you only use WhatsApp or Google Messages), LG Email, Smart Cleaning, and carrier bloatware. Do not disable Google Play Services or Google Services Framework, since WhatsApp push notifications and calls are delivered through them; leave Carrier Services enabled too if you want RCS in Google Messages. See how others solved this on Reddit

GIFs and pictures go out as MMS, which needs mobile data and a correct MMS APN. Make sure mobile data is on, then check Settings > Network & internet > Mobile network > Access Point Names and confirm your carrier's MMS settings are correct (or reset the APN to default). For reliable GIF and media sharing, use WhatsApp or Google Messages from the Play Store, since both send media over data or Wi-Fi and avoid the MMS/APN quirks that affect LG's built-in messaging app. See how others solved this on Reddit

Yes. RCS runs through Google's Messages app, not LG Messaging, so install Google Messages from the Play Store and set it as default under Settings > Apps & notifications > Default apps > SMS app. Then open Messages > Settings > Chat features (RCS) and toggle it on; make sure Carrier Services is updated in the Play Store, since RCS activation depends on it running in the background, and status can take a little while to switch to 'Connected'. See how others solved this on Reddit