Why Xiaomi Redmi phone brakes and lags: a full analysis of the causes + ways to fix

Your Xiaomi Redmi is slowing down, apps are late, and animations are twitching? This is a common problem that can occur even on relatively new models — from the budget Redmi 9A to the flagship Redmi K50. 80% of the time, the brakes are not due to hardware, but to software failures, improper settings or overloading the system.

In this article, we’ll look at all the possible causes of lags, from the banal lack of RAM to hidden MIUI errors, and give step-by-step instructions on how to return the performance to the smartphone. Importantly, some methods (such as factory resets) require data backup, so check for more gentle ways first.

If your Redmi isn’t just slowing down, but is completely frozen or restarted, the problem can be more serious, from damaged firmware to hardware malfunctions, in which case you’d better jump right to the hardware crash section.

Top.-5 Why Xiaomi Redmi is Lagging (and How to Check Them)

So, to start with the most obvious and easily fixable problems, most of the time, the brakes are caused by:

• 📱 Overloaded RAM — MIUI aggressively closes the background processes, but sometimes this is not enough.
• 🗑️ Cluttered storage – less than 10% of free disk space leads to slowdown.
• 🔄 Older Firmware - in New Versions MIUI Correcting productivity errors.
• 🦠 Viruses or malicious applications – especially if you have installed them APK unverified.
• 🔋 Battery problems – a worn-out battery can cause sudden performance drawdowns.

Before you start the “deep cleaning”, follow the basic steps:

1. Restart the phone (press the power button → Reboot).
2. Check the free space in the Settings → Storage.
3. Update all apps in Google Play → My apps.

If you have left behind, read on. We'll go through each cause in detail.

Lack of RAM: how to free RAM on Xiaomi

MIUI is known for aggressively managing RAM (RAM), which saves battery power on the one hand, and can cause slowdowns when switching between apps. If you have Settings menu → About phone → Memory you see less than 500-800MB free, it’s time to act.

Here's what you can do without root rights:

• 🚫 Turn off auto-run of unnecessary apps: Go to Settings → Annexes → Autorun control. Sort the list by last use date. Turn off autorun for underutilized programs (like games or instant messengers that aren't needed in the background).
• ⚡ Enable "Acceleration" in the settings MIUI: Settings → Special facilities → System Acceleration Here you can activate the option Clean Memory when blocked - it will automatically release RAM off-screen.
• 🔄 Use the built-in optimizer: Press the Home button (or swipe up and hold your finger on the screen) → Click Clean in the lower right corner.

Pay special attention to the following types of applications:

• 🎮 Game cheats (e.g. GameGuardian, Lucky Patcher) – they often contain malicious code.
• 📱 Launchers and themes from third-party developers – may conflict with MIUI.
• 🔍 «Optimizers and cleaners – they often become a source of lags.
• 💰 “Make Money” apps – most of them are either fraudulent or overload the system with ads.