WhatsApp for Poco M4 Pro

MIUI aggressively kills WhatsApp in the background, which stops incoming call notifications from waking the lock screen. Go to Settings > Apps > Manage apps > WhatsApp > Battery saver and set it to No restrictions, then under Other permissions enable Display pop-up windows while running in the background and Show on lock screen. Also lock WhatsApp in the Recents/multitask view (pull the app card down until a lock icon appears) so MIUI won't clear it from memory. See how others solved this on Reddit

Video call lag on the M4 Pro is usually MIUI throttling the app plus battery restrictions interrupting the call. Set WhatsApp to No restrictions under Settings > Apps > Manage apps > WhatsApp > Battery saver, and turn off any system Battery saver mode while you're on a call. If your connection is weak, the call quality will drop regardless, so test on strong Wi-Fi; WhatsApp's Settings > Storage and data > Use less data for calls can stabilize a shaky connection but slightly lowers quality, so only enable it if calls keep dropping. See how others solved this on Reddit

WhatsApp media (photos, videos, voice notes) silently fills the M4 Pro's storage far faster than the chat text. Open WhatsApp > Settings > Storage and data > Manage storage to bulk-delete large files using the Larger than 5 MB and Forwarded many times categories, then turn off Settings > Storage and data > Media auto-download for Mobile data, Wi-Fi, and Roaming. Clearing only the cache via Settings > Apps > Manage apps > WhatsApp > Clear data > Clear cache is also safe and won't delete your messages. See how others solved this on Reddit

Newer WhatsApp features roll out gradually account-by-account, so they can appear later regardless of phone, but an outdated app is the most common cause. Update WhatsApp from the Play Store (search WhatsApp > Update, or Profile icon > Manage apps & device > Updates available). If it's already current, the rollout simply hasn't reached your account yet and there's no reliable way to force it; clearing the Play Store cache under Settings > Apps > Manage apps > Google Play Store > Clear data > Clear cache only helps if an update is genuinely stuck. See how others solved this on Reddit

The M4 Pro 4G reaching end of software support means it stays on an older MIUI/Android version, but WhatsApp keeps working as long as your Android version isn't below WhatsApp's minimum supported version. Keep the app updated through the Play Store since WhatsApp support depends on the app and Android version, not on HyperOS, and back up your chats to Google Drive via WhatsApp > Settings > Chats > Chat backup. If WhatsApp ever warns it's dropping support for your Android version, that backup lets you restore everything on a newer phone. See how others solved this on Reddit

Delayed or missing notifications are the most common M4 Pro complaint, caused by MIUI's battery optimization sleeping the app in the background. Go to Settings > Apps > Manage apps > WhatsApp > Battery saver and choose No restrictions, then on the same WhatsApp app-info screen enable Autostart. Finally, open WhatsApp > Settings > Notifications to confirm notifications and sounds are on, and turn off any system-wide Battery saver mode that pauses background apps. See how others solved this on Reddit