WhatsApp for LG X power

This usually happens when the SIM can't receive the verification SMS, so check that the LG X power has a working signal and that your number is typed in full international format (country code, no leading zero). Wait out the timer and choose "Call me" instead to get the code by voice, and make sure the SIM can receive normal text messages from another contact first. If it still fails, pop the SIM into another phone to receive the code, then move it back. See how others solved this on Reddit

WhatsApp drops support for older Android versions over time, and the LG X power shipped on Android 6 Marshmallow, which is now below WhatsApp's minimum, so the app can eventually stop receiving updates and refuse to open. There are no more LG software updates to raise the Android version, so once your installed WhatsApp build expires you'll need a newer phone to keep using it. Back up your chats via WhatsApp > Settings > Chats > Chat backup to Google Drive before that happens so you can restore them on a new device. See how others solved this on Reddit

This is a video codec problem on the older Android build, where WhatsApp can decode the sound but not the picture. Update WhatsApp from the Play Store, clear its cache under Settings > Apps > WhatsApp > Storage > Clear cache, and try saving the clip to the gallery to play it in a separate player like VLC. Asking the sender to share the file as a Document rather than a video forces the original file through so it plays correctly. See how others solved this on Reddit

A sudden drop in battery life often points to one app waking the phone constantly rather than the cell itself failing. Open Settings > Battery to see which apps top the usage list, and if WhatsApp or Google Play Services are abnormally high, clear their cache under Settings > Apps and reboot the phone. You can also limit drain by opening WhatsApp > Settings > Storage and data and turning off media auto-download so it isn't constantly pulling files in the background. If usage still looks normal but the phone dies fast, the LG X power's 4100mAh battery may simply have aged after years of charge cycles. See how others solved this on Reddit

Yes, the LG X power makes a decent dedicated WhatsApp device thanks to its big battery, but each phone needs its own number since one WhatsApp account is tied to one SIM. Install WhatsApp from the Play Store, verify the SIM you keep in it, and use WhatsApp's linked-devices feature only if you want the same account mirrored from your main phone. Keep WhatsApp updated as long as the Play Store still offers it, since support for this older Android version is ending. See how others solved this on Reddit