Many owners of the popular model notice that over time the interface begins to react with a delay, and applications open longer than usual. Redmi Note 7, released in 2019 based on the Snapdragon 660 processor, was originally positioned as the “king of the budget segment”, but modern software requirements dictate their terms. MIUI It gets heavier with each update, which puts a significant strain on the device’s hardware platform.
The main reason for the performance decline is the accumulation of system debris and data fragmentation, which is characteristic of the Android file system. Users often ignore the background processes that consume RAM, leaving no resources for current tasks. In this article, we will discuss in detail how to return the smartphone to its former friction without having to buy a new device.
Internal memory overflow and cache
One of the most common reasons why the Redmi Note 7 is slow is because it is critically filling the internal storage. When free is less than 10-15% of the total storage, the speed of writing and reading data drops, causing "freezes" in the interface and long loading of applications. Android uses free space for temporary files and virtual memory, and the absence of this buffer leads to crashes.
Special attention should be paid to the cache of messengers such as Telegram or WhatsApp, which can take up gigabytes of space over the years of use. Automatic downloading media files in chats unnoticed by the user eats up precious resources. Regular cleaning of this data through the application settings allows you to free up a significant amount of space without removing important correspondence.
To manually clean, you need to go to the Settings → Storage menu and analyze which categories take up the most space. Often it turns out that half of the volume is occupied by forgotten downloads or duplicate photos. Use the built-in Cleanup tool in the Security app, but be careful not to delete the desired files.
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Periodically check the DCIM/.thumbnails folder – there can be stored gallery thumbnails that swell to several gigabytes.
Background processes and MIUI bloating
MIUI is known for its aggressive resource management, but paradoxically consumes a lot of power and memory. Many pre-installed Xiaomi services, such as Mi Cloud, Mi Video and Mi Music, run in the background even if you don’t use them. This puts a constant strain on the Snapdragon 660 processor, leaving no power reserve for heavy gaming or multitasking.
In addition to system services, third-party apps that are prescribed for autoboots are also a problem. Social networks and news aggregators often update feeds in the background using the Internet channel and CPU time. Disabling unnecessary notifications and background activity is a critical step to speed up work.
⚠️ Note: Do not disable system processes with unknown names, especially those associated with the System Framework or MIUI, Otherwise, the phone may go into a cyclical reboot.
To limit app appetites, go to Settings → Apps → All Apps. Select heavy programs, go to Battery and set No Limits mode for instant messengers only, and for the rest, choose Energy Saving or Background Limitation.
MIUI's Hidden Services
Problems with RAM and swap
The Redmi Note 7 came in versions with 3, 4 and 6 GB of RAM, and for modern standards, 3 GB is the absolute minimum. When the physical RAM is filled, the system starts using a swap mechanism, writing data to internal storage, which works much slower, this manifests itself as lags when switching between open tabs.
Visual effects also play a role: transition animations, live wallpapers and desktop widgets consume the resources of the graphics accelerator. Disabling unnecessary animations in the developer menu allows you to visually speed up the interface response, creating a sense of faster device operation.
- 🚀 Enable Memory Acceleration mode in the Security for Forced Cleanup app RAM.
- 🚀 Remove weather and news widgets from the home screen, they constantly update data.
- 🚀 Use lightweight versions of applications (Lite) that consume less resources.
To access the hidden animation settings, activate the developer mode by seven times clicking on the build number in the About Phone section. Then, in the Additional → For developers menu, find the Windows Animation, Transition Animation and Animation Duration scales by setting 0.5x or Off.
Impact of System Updates and Firmware
Users often complain about slowing down immediately after the MIUI update. New firmware versions are optimized for more powerful hardware, and older devices may not be able to cope with new visual elements and features.
It is believed that artificially slowing down old models with new updates is a marketing ploy, but most often it is just unoptimized code. If after the update the phone began to work unstable, it makes sense to consider resetting to factory settings or rolling back to the previous version of the software.
☑️ Check before updating
Check for updates via Settings → About Phone → MIUI. If you have a Beta version installed (Weekly), it is better to switch to a stable branch (Stable), since it contains fewer errors and runs smoother on older devices.
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Fresh firmware doesn’t always mean better performance for older models; sometimes stability is more important than new features.
Technical condition and overheating
The hardware is also subject to wear. The Redmi Note 7 has a processor that is prone to heat at high loads. When critical temperatures are reached, trottling is activated, a forced reduction in the frequency of the processor to prevent damage, which causes sharp falls in FPS in games and delays in menus.
Battery degradation also affects the system, and if the battery can't deliver the current it needs, the processor may not be getting enough power to run at the maximum frequencies, and you can check the battery's condition using an engineering menu or special utilities.
To enter the engineering menu, dial ##6484## in the call app. In the Battery section, you can see the current voltage and status. If the battery is swelling or discharged quickly, replacing it will solve the problem of sudden shutdowns and brakes.
| Parameter | Norma. | Critically. |
|---|---|---|
| CPU temperature | 45°C | 60°C |
| Battery charge | 100% | less than 20% |
| Free RAM. | more than 1 GB | less than 300 MB |
| Free ROM | more than 5GB | less than 1 GB |
Radical methods: Resetting and flashing
If software methods fail, the last effective way is a complete reset, which removes all user data, apps and settings, returning the phone to the “out of the box” state, often because of years of registry errors and file conflicts that cause instability.
Before the procedure, be sure to back up contacts, photos and important documents to the Mi Cloud or your computer, and reset can be done via the Recovery Mode menu or through your phone settings if you have access to the menu.
⚠️ Note: After reset, the phone will be turned on longer than usual (before the phone is reset) 10-15 - minutes), because the system recreates the file structure!
To enter Recovery mode, turn off your phone and press Volume+ and Power at the same time. From the menu that appears, select English/Chinese and click Wipe Data → Wipe All Data. Confirm and wait for the process to complete.