WhatsApp for Xiaomi Redmi 3s

WhatsApp has been dropping support for older Android versions, and the Redmi 3s shipped on Android 5.1/6.0 (MIUI 8-9), which now sits at or below WhatsApp's minimum requirement, so the app may refuse to verify or connect. Check Settings > About phone for your Android version; the Redmi 3s cannot be officially updated past Android 6, so there is no software fix and the reliable option is to migrate your account and chat history to a newer phone. Before switching, back up your chats in WhatsApp > Settings > Chats > Chat backup so the history restores on the new device. See how others solved this on Reddit

First force a hard restart by holding the Power button for 15-20 seconds, and if nothing happens leave it charging on a known-good cable and charger for at least 30 minutes, since a deeply drained battery shows no response. If it still stays dark, try booting into recovery by holding Power + Volume Up; reaching the Mi-Recovery menu means the hardware is alive and a wipe or reflash can help, while no response there usually points to a dead battery or a faulty charging port that needs service. See how others solved this on Reddit

On MIUI the feature is under Settings > Dual apps (older builds call it App Cloning), where you toggle WhatsApp on to create a second cloned copy on your home screen, then register it with a different number. If you don't see the option, update MIUI in Settings > About phone > System update, since some regional or older builds hid or removed it; as an alternative you can run the second number through WhatsApp Business, which is a separate free app on the Play Store. See how others solved this on Reddit

The Redmi 3s officially supports microSD cards up to 128GB, and many users report larger 256GB cards working as long as they are formatted to exFAT or FAT32 first. Insert the card and check it under Settings > Storage; note that WhatsApp keeps its media folder in internal storage by default, so to free space use a file manager to move older media to the card, or rely on Google Drive backup to offload it. See how others solved this on Reddit

For light messaging and music the Redmi 3s hardware (Snapdragon 430, 4100mAh battery) handles WhatsApp and Spotify fine, but the real blocker today is its old Android version, which WhatsApp and many apps no longer fully support. Since the Redmi 3s is stuck on Android 6, even a clean reset won't keep WhatsApp running long-term, so for a dependable WhatsApp-and-Spotify device you are better off with any phone shipping Android 10 or newer. See how others solved this on Reddit

The Redmi 3s can mirror WhatsApp alerts to most Bluetooth watches as long as the watch's companion app has notification access enabled under Settings > Apps > Permissions > Special app access > Notification access. Keep in mind these are usually read-only relays of text and image previews; whether you can reply or answer WhatsApp calls from the wrist depends on the watch platform, and Wear OS watches like the Xiaomi Watch 2 generally only mirror notifications rather than place full WhatsApp calls. See how others solved this on Reddit