WhatsApp for Samsung Galaxy Express Prime

Most of these come from Samsung Internet's web notifications or ad-heavy sites. Open Samsung Internet, tap the menu, go to Settings > Sites and downloads and turn on Block pop-ups. Then go to Settings > Apps > Samsung Internet > Notifications and turn notifications off, or in the browser open Settings > Sites and downloads > Notifications and remove any sites you don't recognize. If pop-ups keep appearing even outside the browser, a recently installed app is usually to blame, so check Settings > Apps for anything unfamiliar and uninstall it. See how others solved this on Reddit

On this older budget Samsung, slowdowns usually come from full storage and too many background apps. Go to Settings > Apps and disable or uninstall apps you never use, and clear cached data for heavy apps via Settings > Apps > [app] > Storage > Clear cache. To make the interface feel snappier, enable Developer options (Settings > About phone > tap Build number seven times), then set Window, Transition, and Animator animation scales to 0.5x. Keeping at least a couple GB of free internal storage makes the biggest difference on hardware this modest. See how others solved this on Reddit

Older Samsung batteries lose capacity over time. Check Settings > Battery to see which apps are using the most power, then limit them or uninstall the worst offenders. Lower your screen brightness and shorten the screen timeout under Settings > Display, and turn off background sync for accounts you rarely use under Settings > Accounts. The Galaxy Express Prime has a sealed (non-removable) battery, so if it drains very fast even after these tweaks, a battery replacement at a repair shop is the only real fix on a phone this old. See how others solved this on Reddit

Yes, it still handles calls, texts and light apps fine, but it stopped getting security patches long ago, so avoid banking and other sensitive apps on it. Keep Google Play Protect on via Play Store > Profile > Play Protect, only install apps that still support its Android version, and use a browser like Chrome that still gets its own updates. Treat it as a backup or kids' device rather than your main phone for anything important. See how others solved this on Reddit

This phone ships with very limited internal storage. Go to Settings > Apps and clear cached data on big apps, and uninstall ones you rarely open. Insert a microSD card, then move photos and videos to it (or back them up with Google Photos and delete the local copies). In the Camera app's settings you can set the storage location to the SD card so new photos save there automatically, which is the easiest long-term fix. See how others solved this on Reddit

Open Settings > Accounts > Google and make sure Contacts sync is on so your contacts save to your Google account automatically. For photos, install Google Photos and turn on Back up & sync; your photos upload to your Google Photos storage and can be restored on any new phone. If you're moving to another Galaxy, Samsung's Smart Switch app can transfer everything directly over Wi-Fi or USB cable. See how others solved this on Reddit