WhatsApp for Samsung Galaxy S8 Active

The cleanest way on the S8 Active is to install your second number's WhatsApp inside Secure Folder, which Samsung treats as a fully separate app instance. Go to Settings > Lock screen and security > Secure Folder, set it up, then open Secure Folder and use its built-in Play Store (or the Add apps button) to install a second copy of WhatsApp that runs independently from your main one. Register it with your second phone number. Note that the Secure Folder WhatsApp may not deliver notifications while the folder is locked, so keep the folder unlocked if you need live alerts. See how others solved this on Reddit

After the Android 9 (Pie) update, Samsung's aggressive battery optimization often stops WhatsApp from waking the lock screen for calls. Go to Settings > Apps > WhatsApp > Battery and set it to Unrestricted (turn off "Put app to sleep"), then under Settings > Device care > Battery > App power management, make sure WhatsApp isn't in the Sleeping or Deep sleeping apps list. Also confirm WhatsApp's call notifications are enabled under Settings > Apps > WhatsApp > Notifications so call alerts can light up the screen. See how others solved this on Reddit

When you snap a photo from inside WhatsApp's own camera, it defaults to a cropped square/4:3 frame rather than using the S8 Active's full sensor. To get full-resolution shots, open the stock Camera app instead, take the picture normally, then share it into WhatsApp via the attach (paperclip) > Gallery option. This sends the original full-frame image rather than WhatsApp's in-app cropped capture. See how others solved this on Reddit

The persistent "WhatsApp Web is active" notification is an ongoing notification, and Always On Display can keep waking to show it. The simplest fix is to log out of WhatsApp Web from your computer, or in the phone app under WhatsApp > Settings > Linked devices > tap the session > Log out. You can also stop AOD from reacting to notifications under Settings > Lock screen > Always On Display, or silence that specific channel by long-pressing the notification and turning it off under Settings > Apps > WhatsApp > Notifications. See how others solved this on Reddit

The S8 Active stopped at Android 9 and no longer gets security updates, so newer WhatsApp builds and other apps are starting to drop support for it. Before upgrading, back up your chats via WhatsApp > Settings > Chats > Chat backup to Google Drive so you can restore on the new device. A current Samsung running One UI (recent models get several years of updates) makes for an easy migration, since restoring from a Google Drive backup works across Android phones as long as you use the same phone number. See how others solved this on Reddit

Many owners still run a stock S8 Active fine for WhatsApp, but since it's stuck on Android 9 you should expect occasional slowdowns and eventual loss of WhatsApp support as minimum-OS requirements rise. Keep WhatsApp updated from the Play Store as long as it still installs, keep chats backed up to Google Drive under WhatsApp > Settings > Chats > Chat backup, and clear cache periodically via Settings > Apps > WhatsApp > Storage > Clear cache to stay responsive. When WhatsApp finally flags the OS as unsupported, that's your real signal to upgrade. See how others solved this on Reddit