WhatsApp for Samsung Galaxy Pocket 2

The Pocket 2 has very limited RAM and storage, so WhatsApp often fails to install or crashes once memory runs out. Free up space in Settings > Battery and device care > Storage by clearing caches and removing unused apps, then make sure both Google Play Store and WhatsApp are updated. Install WhatsApp to internal storage rather than an SD card, and reboot before launching it. On very old, low-storage Samsung models WhatsApp may simply outgrow the hardware, so keeping only one or two other apps installed helps it run at all. See how others solved this on Reddit

This usually means your account is healthy but the phone app is hitting a local storage or database limit, which is why the linked Web session keeps working. On the phone go to Settings > Apps > WhatsApp > Storage and clear the cache (not data), then reopen the app and let it resync. If it is still stuck, back up your chats in WhatsApp > Settings > Chats > Chat backup, uninstall, and reinstall so it rebuilds a clean local database. See how others solved this on Reddit

Voice messages fail when WhatsApp lacks microphone permission, or when the proximity sensor routes playback to the earpiece. Check Settings > Apps > WhatsApp > Permissions and enable Microphone, then when playing a voice note make sure you aren't covering the top of the phone, which switches audio to the earpiece via the proximity sensor. Clearing the WhatsApp cache and updating to the latest Play Store version also fixes garbled or silent recordings. See how others solved this on Reddit

On One UI, WhatsApp calls can bypass Do Not Disturb because they are treated as a calling service rather than a normal notification. Go to Settings > Notifications > Do not disturb and check the Apps / exceptions list, then remove WhatsApp so its calls are silenced. Also open WhatsApp > Settings > Notifications and make sure you haven't allowed calls to override the system, since an exception there will keep ringing through DND. See how others solved this on Reddit

It works for text and calls, but expect it to feel sluggish and to consume most of the phone's limited storage, so keep media auto-download off. In WhatsApp > Settings > Storage and data, turn off automatic photo and video downloads for both mobile and Wi-Fi, and periodically clear large files under Manage storage. Keeping only WhatsApp plus one or two essential apps installed gives the smoothest experience on this hardware. See how others solved this on Reddit