Xiaomi Redmi Note 9 Deep Optimization: Full Guide

Owners of the Xiaomi Redmi Note 9 often find that over time, the device starts to work slower and the battery is consumed faster. This is a natural process for any gadget running a MIUI shell that requires regular maintenance. However, the correct configuration of the system can work wonders, returning the device to its former abruptness even after years of operation.

In this article, we will discuss the non-obvious acceleration methods that are often overlooked by ordinary users. You will learn how to turn off unnecessary processes, adjust energy savings without compromising functionality and protect the system from intrusive advertising. Reducing the screen refresh rate to 60 Hz in some cases can extend battery life to 20%.

Basic cleaning and memory management

The first step to optimizing is always to review the accumulated digital debris. Android, in conjunction with the MIUI shell, actively cache application data, which over time takes up gigabytes of free space. When free memory becomes critically scarce (less than 10%), the speed of writing and reading files decreases, causing the interface to slow down.

Use the built-in Security app, which is already pre-installed on the system, which allows you to quickly delete temporary files and cache, but for a deeper cleaning, you should look at the storage settings manually.

• 🗑️ Remove folders left by remote applications in the root directory.
• 📸 Check the folder. DCIM/Camera Delete the failed photos or duplicate videos.
• 📲 Move heavy files (movies, archives) to an external drive or cloud storage.

You don't have to rely on automatic cleaners. Regular manual control of Download and Documents folders gives you the best result, and even releasing 2-3 gigabytes can significantly affect the speed of the system.

⚠️ Note: When cleaning the cache of messengers (WhatsApp, Telegram) through the Android settings, you can lose photos and documents saved in chats if they were not previously saved to the gallery.

Special attention should be paid to applications that you haven't used in a long time. They not only take up space, but can run background services, consuming CPU resources. Removing unnecessary software is the easiest way to reduce the load on RAM.

Customization of interface and animations

The visual component of the MIUI shell is often the cause of perceived lags when the phone seems slow due to long transition animations. The real performance of the Snapdragon 720G or Helio G85 processor has nothing to do with it, it's about the time frames are rendered.

To speed up the response, you need to activate the developer menu, 7 quick clicks on the build number in the About Phone section, and then the Developer option will appear in the advanced settings.

Inside the developer menu, find the zoom section, and you want three things: window animation scale, transition animation scale, and animator duration scale.

• 📉 Set the value 0.5x for all three animation parameters.
• 🚫 Turn off animations completely if your smartphone is used by older people or children for maximum speed.
• ⚙️ Do not change other settings in the developer menu unless you are sure of their purpose.

Changing these settings makes the interface more twitchy, but it makes navigation on the menu much faster. Windows open instantly, creating a sense of working on a flagship device. This is especially true for the Redmi Note 9, which is no longer a novelty in the market.

Energy management and background processes

One of the main problems of modern smartphones is the inflating of RAM by background applications. MIUI aggressively manages energy, but sometimes this mechanism works incorrectly, or, conversely, allows unnecessary programs to hang in memory.

Go to the battery settings and select mode of operation. Select Performance for maximum performance, but this will result in a faster discharge. For everyday use, balance is optimal, but with manual setting of restrictions.

In the Apps section -> Permissions -> Autorun, leave only messengers and navigators on. Other programs, such as marketplaces or news feeds, should not start with the system.

Also, check your Google account sync settings and Mi Account, and if you don't need instant sync of contacts or photos, turn it off or switch to Wi-Fi Only mode, which will reduce the load on the radio module and the processor.

Disabling advertising in the MIUI system

Intrusive advertising is a scourge of MIUI, which is very annoying to users and consumes traffic. Advertising modules are loaded into standard applications: conductor, music, themes and even task manager. Disabling advertising is a mandatory step of optimization.

First, you need to disable the MSA (MIUI System Ads) service. Go to Settings -> Passwords and Security -> Access personal data. Find the msa list and turn off the switch. The system will try to dissuade you by requiring you to wait 10 seconds - be patient and press "Cancel".

Next, you should go through the built-in applications. In the Security app, click on the gear and turn off "Receive recommendations." In the Themes app, a similar setting is in the user profile.

• 📺 In the Music app, turn off "Show Ads" in the settings.
• 📂 In the Explorer, remove the tick from the item "Get content».
• 🔍 In Google Search, Turn Off Personalization to Reduce Advertising Snippets.

After this, the interface will be cleaner and the load on the processor from loading banner ads will disappear, which will also increase the level of privacy, as the system will collect less data about your preferences.

Optimization of network and Wi-Fi

Internet speed directly affects the perception of smartphone performance. If pages load for a long time, the system lags (illusion) are created. Redmi Note 9 is characterized by periodic problems with connection stability, which can be corrected by setting up DNS.

Using a private DNS can speed up server response and block some of the ads at the network level. Go to Settings -> Connection and Sharing -> Private DNS.

⚠️ Note: Do not use unknowns. DNS-The best choice is dns.google or 1dot1dot1dot1.cloudflare-dns.com. Incorrect address can completely cut off access to the Internet.

Also worth noting is the Wi-Fi Assistant feature, which allows your phone to switch to mobile internet if the Wi-Fi signal is weak. On the Redmi Note 9, this feature sometimes doesn't work properly, causing constant reconnections. If you don't have any speed issues, you'd better turn it off for stability.

For mobile network users 4G It is useful to reset the settings of access points (APN) It's done in the settings section, if you have any problems with speed. SIM-Often, operators change gateway parameters, and the old settings are no longer optimal.

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Periodically (once a month) turn on and off flight mode, which causes the modem to re-register on the network and choose the most free base station, which improves the quality of communication.

System update and resetting

The final step of optimization is to work with software. An outdated version of Android or MIUI may contain performance-impairing bugs. Always check for updates in the About Phone section.

However, if you’ve been using a smartphone for several years, switching to the latest version of the shell can, on the contrary, slow down the old hardware, in which case experienced users recommend staying on a stable version that has proven itself well.

If nothing helps and the phone is unstable, the radical but effective method is a complete factory reset. Be sure to back up the data before doing so.

Settings → About the phone → Reset settings → Erase all data

Clean installation removes all the accumulated system errors and file conflicts, and once reset, the phone works as fast as it did on the first day of purchase, and it's the best way to rejuvenate the device software.

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Full reset eliminates 90% of software speed problems caused by the accumulation of system debris and update conflicts over a long period of operation.