WhatsApp for Motorola Edge 30 Fusion

This buzzing usually comes from the mic picking up interference or from WhatsApp's audio processing, so first force-close WhatsApp from Recents and toggle Airplane mode on and off to reset the audio routing. Open Settings > Apps > WhatsApp > Permissions and confirm Microphone is allowed, then update WhatsApp to the latest version from the Play Store, since several buzzing-call complaints were resolved in newer builds. If it persists, try a wired or Bluetooth headset to confirm whether the built-in mic is at fault. See how others solved this on Reddit

Motorola Edge phones have multiple mics and noise-cancellation can over-process your voice, so clear the bottom mic hole of any dust or case obstruction first. Go to Settings > Apps > WhatsApp > Permissions > Microphone and make sure access is set to Allow, then open Settings > Apps > WhatsApp > Battery and choose Unrestricted so the app isn't throttled mid-call. Updating WhatsApp from the Play Store and rebooting the phone resolves most muffled-mic reports tied to this model line. See how others solved this on Reddit

Some warmth is normal because the camera, modem and screen all run together, but excessive heat usually means a background or charging conflict, so unplug the charger while calling and remove any thick case. Reduce the load by switching to Wi-Fi and lowering screen brightness, and close other camera or streaming apps running in the background. If the phone throttles or the call drops, clear WhatsApp's cache via Settings > Apps > WhatsApp > Storage > Clear cache and update the app from the Play Store. See how others solved this on Reddit

Motorola's aggressive battery management is the usual cause, so go to Settings > Apps > WhatsApp > Battery and set it to Unrestricted, then under Settings > Battery turn off any adaptive or optimized battery feature that could throttle the app. Also confirm Settings > Apps > WhatsApp > Notifications is fully enabled and that Do Not Disturb isn't silencing it. Keeping WhatsApp excluded from battery optimization is what fixes the delayed-delivery and missing-notification issue on these Edge models. See how others solved this on Reddit

Overnight drain with warmth points to an app staying awake in the background and syncing constantly. Open Settings > Battery > Battery usage to see which app consumed power overnight, then set heavy offenders to Optimized under Settings > Apps > [app] > Battery (keep WhatsApp on Unrestricted so notifications still arrive). Turning off always-on background data for non-essential apps and restarting the phone usually stops it from heating while idle. See how others solved this on Reddit

Connection failures are usually permission or network related, so first check Settings > Apps > WhatsApp > Permissions and grant both Camera and Microphone, then test the call on a different network to rule out a weak signal. Clear the app's cache via Settings > Apps > WhatsApp > Storage > Clear cache and make sure WhatsApp is updated from the Play Store. If video still freezes, restart the phone and disable any VPN, which commonly blocks WhatsApp's call connection. See how others solved this on Reddit