WhatsApp for Samsung Galaxy On5

Likely yes over time. The Galaxy On5 shipped on Android 5.1 Lollipop (some variants on 6.0 Marshmallow), and WhatsApp has steadily raised its minimum Android requirement, dropping support for older versions. Once your device falls below the cutoff, the app stops getting updates and eventually can't send or receive messages. Before that happens, open WhatsApp > Settings > Chats > Chat backup and save a Google Drive backup, then move your account to a phone running a newer version of Android. See how others solved this on Reddit

On older Samsung phones this is almost always battery optimization or restricted background data killing WhatsApp in the background. Go to Settings > Apps > WhatsApp > Battery and set it to Unrestricted (on older One UI, remove WhatsApp from Settings > Device maintenance > Battery > App power monitor / sleeping apps), and confirm notifications are on under Settings > Apps > WhatsApp > Notifications. Also allow background data under Settings > Apps > WhatsApp > Mobile data (or Settings > Connections > Data usage). See how others solved this on Reddit

WhatsApp bundles notifications by default, and the On5's notification panel collapses them into one summary. Open WhatsApp > Settings > Notifications and confirm Message notifications are enabled with previews and 'Use high priority notifications' turned on. Then go to Settings > Apps > WhatsApp > Notifications and make sure the Messages category is enabled and set to pop up on screen. Toggling the high-priority setting off and back on often restores per-message alerts. See how others solved this on Reddit

Recording failures are usually a microphone permission issue, and playback that goes to the earpiece instead of the speaker is the proximity sensor. Go to Settings > Apps > WhatsApp > Permissions and confirm Microphone is allowed, then clear the cache via Settings > Apps > WhatsApp > Storage > Clear cache. If recordings cut off, hold the record button (or swipe up to lock it) rather than tapping, and make sure nothing is covering the proximity sensor near the earpiece during playback. See how others solved this on Reddit

Backups stall on this device most often because Google Drive can't authenticate or there isn't enough free storage. Open WhatsApp > Settings > Chats > Chat backup, tap Account, re-select your Google account, and update Google Play services from the Play Store. Free up internal space (the On5 has limited storage) and run the backup on Wi-Fi, since a failed media upload will keep restarting the whole process. See how others solved this on Reddit

A local .crypt14 file can only be restored by WhatsApp itself, and only with the same phone number and Google account that created it. Copy the file into Internal storage > Android > media > com.whatsapp > WhatsApp > Databases on the On5, then reinstall WhatsApp and verify the same number so it detects the local backup and offers to restore. There's no official way to open or decrypt a .crypt14 file separately, so if the matching backup is gone from Google Drive, the local file is your only path. See how others solved this on Reddit