WhatsApp for Infinix Zero 40

A major XOS 15 update can reset app permissions, which breaks WhatsApp media, calls, or notifications. Go to Settings > Apps > App management > WhatsApp > Permissions and re-enable Camera, Microphone, Contacts, Files/Storage, and Notifications. Then open Settings > Apps > Special app access > Display over other apps and turn it on for WhatsApp so the incoming-call screen appears. If features are still broken, clear the WhatsApp cache via App management > WhatsApp > Storage > Clear cache (this does not delete chats), then update or reinstall WhatsApp from the Play Store. See how others solved this on Reddit

XOS uses aggressive battery optimization that suspends background apps, which is the main cause of late WhatsApp messages on Infinix phones. Open Settings > Apps > App management > WhatsApp > Battery and choose Unrestricted / Allow background activity. Also check Settings > Battery for any power-saving or App power management mode and exclude WhatsApp from it. Finally, open Recent apps, find the WhatsApp card, and lock it (swipe down on the card or tap the lock icon) so the system stops closing it. See how others solved this on Reddit

Infinix ships XOS with extra system apps and a recommendation feed that can push notifications and use RAM, but they cannot read your WhatsApp chats. To quiet them, open Settings > Notifications & status bar > App notifications and turn off notifications for Folax, Palm Store, and Phoenix Browser. You can also disable personalized/ad recommendations under Settings > Additional settings (look for a Recommendations or Privacy entry). Long-press any unneeded preinstalled app to uninstall or disable it, which frees RAM so WhatsApp is less likely to be closed in the background. See how others solved this on Reddit

Random restarts on Infinix phones are usually caused by a software glitch, nearly full storage, or a misbehaving app rather than WhatsApp itself. First install any pending update via Settings > System > System update, then free up space (aim for at least 10% free) by clearing junk in Settings > Storage. If reboots continue, back up your chats in WhatsApp > Settings > Chats > Chat backup, then restart into Safe Mode (hold Power, then long-press 'Power off' until the Safe Mode prompt appears) to check whether a third-party app is the trigger. See how others solved this on Reddit

WhatsApp on Android backs up to Google Drive, so your chats are tied to your Google account and phone number, not to Infinix. On the Zero 40 open WhatsApp > Settings > Chats > Chat backup, turn on Include videos if you want media, confirm the correct Google account, and tap Back up. On a new Android phone, install WhatsApp, verify the same number, and tap Restore when prompted. Moving to an iPhone is different: Google Drive backups can't be read by iOS, so use WhatsApp's built-in 'Move to iOS' transfer flow (it pairs the two phones with a QR code). See how others solved this on Reddit

Call drops on Infinix are commonly caused by background restrictions cutting WhatsApp off mid-call or by an unstable Wi-Fi/mobile-data handoff. Make sure WhatsApp can use data in the background via Settings > Apps > App management > WhatsApp > Mobile data & Wi-Fi (enable Background data and Unrestricted data usage), and confirm Microphone is granted under Permissions. If audio is one-way or choppy, open WhatsApp > Settings > Storage and data and turn off 'Use less data for calls', disable any system Data Saver, and test on a different network to rule out a weak signal. See how others solved this on Reddit