WhatsApp for Tecno Camon 30

TECNO's HiOS power manager aggressively kills background apps, which breaks incoming and outgoing WhatsApp calls. Open Settings > Apps > WhatsApp > App battery usage (on some HiOS builds this is Settings > Battery > App battery management) and set WhatsApp to Unrestricted/Allow background activity. Then open the recent-apps (multitask) screen, pull WhatsApp's card down, and tap the padlock so the cleaner can't close it. Finally, confirm WhatsApp has Microphone and Phone permissions under Settings > Apps > WhatsApp > Permissions. See how others solved this on Reddit

This is usually a blocked microphone permission or the proximity sensor pausing playback. Go to Settings > Apps > WhatsApp > Permissions and confirm Microphone is allowed, then clear WhatsApp's cache via Settings > Apps > WhatsApp > Storage > Clear cache. If a voice note goes silent or stops the moment you move the phone, that's the proximity sensor switching to the earpiece working as intended, so keep the phone away from your face to hear it on the loudspeaker. See how others solved this on Reddit

Delayed notifications on HiOS are almost always battery optimization suspending WhatsApp in the background. Open Settings > Apps > WhatsApp > App battery usage (or Settings > Battery > App battery management) and set WhatsApp to Unrestricted/Allow background activity. Then turn on all alert categories under Settings > Apps > WhatsApp > Notifications. Finally, lock WhatsApp in the recent-apps view with the padlock so the system cleaner can't close it. See how others solved this on Reddit

This sync glitch usually clears after fully closing and reopening WhatsApp. If it persists, force-stop the app via Settings > Apps > WhatsApp > Force stop and reopen it. If the unread count is still wrong, update WhatsApp to the latest version from the Play Store, since this has been a known bug fixed in newer releases. See how others solved this on Reddit

That's the heads-up (banner) notification appearing over an open conversation, and it's controlled in Android's notification settings rather than being a phone fault. Go to Settings > Apps > WhatsApp > Notifications, open the Messages category, and turn off Pop-up/Banner (or set it to Silent) to stop the banner sliding in. Muting the specific chat with the bell icon also stops repeated alerts from one conversation. See how others solved this on Reddit

Major HiOS/Android updates can reset app permissions and battery settings, so WhatsApp needs to be re-allowed. After updating, go to Settings > Apps > WhatsApp > Permissions and re-check Microphone, Camera, Notifications, and Contacts, then set its battery usage to Unrestricted. If messaging is still glitchy, clear the WhatsApp cache under Storage and reboot the phone once to let the new build settle. See how others solved this on Reddit