Overview
You just bought a flagship Android phone with 12GB of RAM, expecting lightning-fast app switching and flawless multitasking. Instead, after a week, you notice apps reloading from scratch when you jump between them, the phone feels warmer than it should, and the interface stutters. It’s frustrating because this shouldn’t happen with so much memory. The culprit isn’t faulty hardware or a weak processor—it’s a hidden software setting that limits how Android uses that abundant RAM. In this tutorial, you’ll learn exactly why your phone underperforms and how to fix it with a simple adjustment in the Developer Options. By the end, you’ll reclaim the snappy performance you paid for.
Prerequisites
Before you start, make sure you have:
- An Android phone with 12GB (or more) of RAM (though the fix works on any Android device)
- Android 9 (Pie) or newer (most settings are consistent across versions)
- Admin access to your phone (no root required)
- About 5 minutes of your time
No special tools or apps are needed—everything is built into the system.
Step-by-Step Instructions
1. Enable Developer Options
Developer Options are hidden by default. To unlock them:
- Open Settings on your phone.
- Scroll down to About phone (or System > About phone on some skins).
- Find Build number (if you don’t see it, look for Software information or Kernel version).
- Tap Build number seven times rapidly. You’ll see a toast message saying “You are now a developer!”
- Go back to the main Settings screen. You’ll now see Developer options listed under System or near the bottom.
2. Adjust Memory Optimization Settings
Two key settings often cause the problem: “Don’t keep activities” and “Background process limit.” Both can aggressively kill apps to save memory, even when you have plenty.
Disable “Don’t keep activities”
- Go to Settings > Developer options.
- Scroll down to the Apps section.
- Look for Don’t keep activities. If it’s enabled (switch is on), tap to turn it off.
- This setting tells Android to destroy every activity as soon as you leave it, forcing a full reload. Disabling it restores normal background activity retention.
Set “Background process limit” to “Standard limit”
- Still in Developer options, scroll further down to the Apps section.
- Find Background process limit. (This may be deeper on some ROMs.)
- Tap it and select Standard limit (the default). Avoid “No background processes” or “At most 4 processes,” as those artificially cap how many apps can stay in memory.
3. (Optional) Check Other Memory-Related Settings
Some OEMs add their own memory optimizations. Look for these:
- Memory guardian or RAM optimization (common on Xiaomi/OPPO phones) – disable or set to “Off” or “Light.”
- App hibernation or Auto-stop (Samsung’s Deep Sleep) – turn off for apps you frequently switch between.
- Adaptive battery (under Settings > Battery) – leave it on unless you notice extreme app killing; it rarely causes reloads on high-RAM devices.
4. Reboot and Test
- After changing the settings, restart your phone to apply them cleanly.
- Open 6–8 heavy apps (Chrome, YouTube, Gmail, games, etc.) and switch between them rapidly.
- Notice if apps now stay in memory instead of reloading and if the phone feels cooler and smoother.
Common Mistakes
Mistake 1: Enabling “Don’t keep activities” thinking it saves battery
This is the biggest trap. The setting does prevent memory accumulation, but on a 12GB phone it’s unnecessary. It actually hurts battery life because every app reload costs more CPU cycles than keeping it in RAM.
Mistake 2: Setting “Background process limit” to a low number
Choosing “At most 4 processes” might make RAM usage appear lower, but you’ll kill multitasking. Your phone will reload apps constantly, defeating the purpose of having 12GB.
Mistake 3: Ignoring OEM-specific settings
Brands like OnePlus, Samsung, and Xiaomi often hide aggressive memory management under their own names. Look for “RAM booster,” “Memory extension” (uses storage as virtual RAM), or “Game mode” optimizations that limit background apps. Disable or adjust these where possible.
Mistake 4: Not restarting after changes
Some settings (like background process limit) take full effect only after a reboot. If you skip this step, you might think the fix didn’t work.
Summary
A 12GB Android phone should feel near-instant when switching apps. If it doesn’t, the reason is almost always aggressive memory optimization settings buried in Developer Options. By disabling “Don’t keep activities” and setting “Background process limit” to “Standard limit,” you stop Android from prematurely killing apps. This fix costs nothing, requires no downloads, and restores the smooth multitasking your hardware is capable of. Always check for additional OEM tweaks that might interfere. With these three simple steps, your phone will finally run like it has 12GB of RAM.