WhatsApp for Infinix Note 12

XOS aggressively freezes background apps to save battery, which kills incoming WhatsApp call alerts. Open Settings > Apps > App management > WhatsApp > Battery and choose 'No restrictions' (allow background activity). Then open Settings > Apps > Auto-start management and enable WhatsApp so it can run after the screen locks. Finally check that WhatsApp's in-app Calls notification channel is on under Settings > Apps > WhatsApp > Notifications. See how others solved this on Reddit

The full-screen incoming-call display needs the 'Display over other apps' permission, which XOS often blocks. Go to Settings > Apps > WhatsApp > Permissions (or Settings > Apps > Special app access > Display over other apps) and allow it for WhatsApp. Then under Settings > Notifications & status bar > App notifications > WhatsApp set the Calls channel to 'Show on lock screen'. Reboot once after granting these so the changes take effect. See how others solved this on Reddit

XOS flags apps it thinks post too many notifications and can mute them. Open Settings > Notifications & status bar > App notifications > WhatsApp and re-enable every category (Messages, Group notifications, Calls), setting each channel's importance so it can 'Make sound and pop on screen'. If the system warning keeps reappearing, dismiss it rather than tapping the suggested 'turn off' option, which is what mutes the channel. See how others solved this on Reddit

Delayed delivery on Infinix is almost always battery restriction or Data Saver cutting WhatsApp's connection when the screen is off. Set Settings > Apps > App management > WhatsApp > Battery to 'No restrictions', enable WhatsApp under Settings > Apps > Auto-start management, and exclude WhatsApp from Settings > Network & internet > Data Saver (mark it Unrestricted). Keeping the app off battery optimization keeps its push connection alive so messages land on time. See how others solved this on Reddit

If WhatsApp messages work but calls are silent, the Calls notification channel is muted or Do Not Disturb is filtering it. Go to Settings > Apps > WhatsApp > Notifications > Calls and set a ringtone with importance 'Urgent', then check Settings > Sound & vibration > Do Not Disturb and allow calls through. Also set WhatsApp to 'No restrictions' under battery so the app isn't frozen in the background when a call comes in. See how others solved this on Reddit

When locked, XOS suspends WhatsApp unless it is exempt from battery optimization and allowed to auto-start. Set Settings > Apps > App management > WhatsApp > Battery to 'No restrictions', enable WhatsApp under Settings > Apps > Auto-start management, and grant 'Display over other apps' so it can wake the screen. A stable connection during sleep is also required, so disable Data Saver for WhatsApp and any 'keep Wi-Fi on during sleep' restriction. See how others solved this on Reddit