Redmi Note 12 Problems: 100% Fix Guide

Is your 120Hz screen stuttering or battery draining? Here is the ultimate 15-step MIUI 14 optimization guide.

15 Steps

5000 mAh Fix

4 Issues

MIUI Optimized

The Redmi Note 12 5G is a solid mid-ranger with a 120Hz AMOLED screen. However, MIUI bloatware and the Snapdragon 4 Gen 1 can sometimes cause UI lag, heating, and camera shake.

Your phone is capable; it just needs some decluttering. Follow these steps to make your Note 12 smooth again.

Problem	Diagnosis	Fix Difficulty
Battery Drain	120Hz Refresh	Easy
App Lag	Memory Extension	Medium
Camera Shake	Electronic Stabilization	Easy

Diagnostic Hub

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Battery Drain

Optimizing 5000mAh for 2-day use.

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App Lag

Fixing UI stutter and freezing apps.

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Camera Shake

Stabilizing the 48MP shooter.

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Heating

Cooling down the Snapdragon 4 Gen 1.

1. Fixing Battery Drain (MIUI 14)

The 120Hz screen is great but hungry. Let's balance it.

Steps 1-3: Power Tuning

Refresh Rate: Go to Display > Refresh Rate. Set it to "Default" (Dynamic). Forcing 120Hz all the time drains 20% more battery.
Remove Ads (MSA): Go to Passwords & Security > Authorization > msa. Revoke it. This stops system-wide ads from using data/battery.
Autostart: Go to Apps > Permissions > Autostart. Disable it for apps like Facebook and Shopping apps. Only keep WhatsApp/Email ON.

2. Solving Lag & Freezing

The Snapdragon 4 Gen 1 is efficient but not a powerhouse. Free up resources.

Steps 4-6: Speed Boost

Memory Extension: Go to Settings > Additional Settings > Memory Extension. Set it to 2GB or 3GB. Maxing it out to 5GB can slow down storage.
Uninstall Bloatware: Remove pre-installed games and apps (GetApps, Theme Store notifications). Long press icon > App Info > Uninstall/Disable.
Animation Scale: Enable Developer Options (Tap MIUI Version 7 times). Set "Window Animation Scale" to 0.5x.

3. Fixing Blurry Photos

The 48MP camera lacks OIS. You need software help.

Steps 7-9: Steady Shots

Night Mode: For low light, ALWAYS use "Night Mode". It takes multiple frames to stabilize the shot and remove blur.
Volume Shutter: Use the Volume Down button to take photos instead of tapping the screen. This reduces hand shake significantly.
Grid Lines: Enable "Grid Lines" in Camera settings to help you hold the phone straight and steady.

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MIUI Tip: Use the built-in "Cleaner" app in the Security folder once a week. It clears cache safely without needing third-party apps.

4. Cooling Down the Phone

The slim profile means less heat dissipation space.

Steps 10-12: Thermal Control

Remove Case: If charging or gaming, remove the TPU case. It traps heat.
Game Turbo: Add games to "Game Turbo". It manages background processes to keep the CPU focused and cooler.
Location: Turn OFF GPS when not using Maps. It's a major heat source.

Warning: Use the 33W charger provided. Using higher wattage chargers won't speed up charging but will heat up the battery.

Additional Maintenance (Steps 13-15)

Step 13 (Updates): Check for MIUI updates. Xiaomi releases bug fixes frequently for Note series.
Step 14 (Restart): Restart your phone every 3 days. It clears RAM and fixes minor glitches.
Step 15 (Factory Reset): If lag persists, do a Factory Reset (Back up data first). This gives a fresh start.

Is Your Note 12 Fixed?

The Redmi Note 12 5G is a classic all-rounder. With these tweaks, you get the battery life and smoothness you expect.

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Xiaomi Redmi Note 12 5G: Complete Problem Fix Guide