How to set up a sensor on Xiaomi: calibration, testing and repair

Touch screen is a key element of any Xiaomi smartphone, which depends on the usability of the device. If the sensor has failed — does not respond to touch, floats cursor, or part of the screen stopped working — it does not always mean that expensive repairs are necessary. In 80% of cases, the problem can be solved softwarely through calibration of the sensor, resetting or updating the firmware.

In this article, we’ll look at all the ways Xiaomi can customize its sensor, from basic checks to complex firmware manipulations, and learn how to check the screen’s performance, calibrate it manually, fix software failures, and even replace the touch module if hardware breakdown is imminent. Instructions are suitable for most models, from the budget Redmi Note to the flagship Xiaomi 14.

Before you start setting up, make sure that the problem is with the sensor, not the protective glass or film, and if the screen cracks or shows physical damage, calibration won't help, you'll need to replace the touch module.

1. Sensor diagnostics: how to check the performance

Before setting up the sensor, make sure the problem is not due to hardware damage or screen contamination.

• 🔍 Check the integrity of the screen: cracks, chips or bloating can disrupt the sensor.
• 🧴 Clean the surface: greasy spots, dust or moisture often cause false touches. Use microfiber and alcohol wipes.
• 🔌 Test without a case: some accessories press on the body, leading to "ghost" presses.

If visually everything is fine, go to the diagnostic software. Xiaomi has built-in tools for testing the sensor:

1. Open the Phone app and enter the combination ##6484## (for some models, #4636###).
2. From the menu, select Touch Screen Test or Touch Screen.
3. Follow the instructions on the screen: swipe all areas of the display. If any areas do not respond, they will be illuminated in red.

An alternative way is to use third-party applications, such as the Touchscreen Test or the Display Tester from Google Play, which allow you to test multi-touch, sensitivity and uniformity of response in more detail.

⚠️ If the sensor does not respond at all (even to unlock gestures), connect the smartphone to the PC through USB-OTG This will help confirm that the sensor is the problem, not the system failure.

2. Sensor calibration on Xiaomi: step-by-step instructions

Sensor calibration is the process of adjusting the accuracy of the screen's response to touch, and it's necessary if:

• 🎯 The cursor “leaves” when pressed (for example, you poke into one icon and another one opens).
• ⏱️ Delay between touch and system response (lag more than 0.3 seconds).
• 🔄 The sensor works in “screws” when scrolling or zooming.

Calibration methods depend on the MIUI version:

Method 1: Engineering menu (for MIUI 12 and older)

1. Open the Phone app and type ##36446337##.
2. Go to the Hardware Testing → Touch Screen section.
3. Press Calibration and follow the instructions on the screen (usually you need to alternately touch the crosses in the corners of the display).
4. After completion, restart the smartphone.

Method 2: Developer Settings (for all versions of MIUI)

If the engineering menu is not available, turn on the developer mode:

1. Go to Settings. → The phone.
2. Click 7 times on the MIUI version until the notification “You became a developer” appears.
3. Back to Settings → Additionally. → For developers.
4. Find the USB Debugging option and Do not turn off the screen while charging (this will help with calibration).
5. Install the Touchscreen Calibration app from Google Play and calibrate through it.

Clean the screen of contamination |

Charge your phone at least 50% |

Turn off the protective film (if any)|

Make sure your hands are not moisture |

Connect charging (for stability of power supply)-->

If calibration didn't work, the problem could be sensor drivers or physical damage to the plume, which would require firmware or repair.

3. Software failures: resetting and flashing

Sometimes the sensor starts to glittle after updating MIUI or installing third-party applications, in which case it helps to reset the settings or reinstall the firmware.

Resetting settings to factory

This will delete all data from the phone, so make a backup copy of the following:

1. Go to Settings → About Phone → Backup.
2. Select Resetting → Delete all data.
3. Confirm the action and wait for the reboot.

If the sensor is not working so hard that you can’t log in to the menu, use Recovery mode:

1. Turn off the phone.
2. Press the Power + Volume buttons up for 10 seconds.
3. From the Recovery menu, select Wipe Data → Wipe All Data (manage volume and power buttons).

Fastboot flashing through Fastboot

If the reset didn't work, try to reflash the phone manually. You'll need a PC and the Mi Flash Tool:

1. Download the official firmware for your model from the Xiaomi Firmware website.
2. Unpack the archive and launch the Mi Flash Tool.
3. Connect your phone in Fastboot mode (clip Power + Volume down when the device is off).
4. In the program, select the downloaded firmware and press Flash.

⚠️ Note: Fastboot flashing deletes all data and can result in a bootloader lock if the phone has been unblocked. Use this method only as a last resort.

Never.|

Rarely (once every few months) |

Frequently (once a week) |

Constantly (daily)-->

Hardware malfunctions: when a sensor replacement is needed

If the software methods didn't work, it's probably hardware.

• 🔌 Sensor plume is damaged (often after falls or pressing the screen hard).
• 💥 A cracked glass that presses on the touch layer.
• 🌡️ Overheating or moisture (oxidation of contacts).
• 🔋 Failure of the sensor controller on the motherboard.

Self-sensor replacement is possible, but requires experience and special tools. If you are not sure about your skills, you should contact a service center. The average cost of replacing a touch module with Xiaomi is from 3,000 to 8,000 rubles (depending on the model).

How to Replace Your Sensor

Replacement will require:

• 🔧 Screwdriver kit (cross, flat, Pentalobe for some models).
• 🧲 Screen suction cup.
• 🔥 Dryer or infrared station for softening glue.
• 📱 New sensor module (select from the phone model).

Step-by-step:

1. Turn off the phone and remove the back cover (heating the edge hairdryer).
2. Turn off the battery to avoid short circuit.
3. Disconnect the display and sensor plumes.
4. Remove the old sensor, gently tucking it in with the mediator.
5. Install a new module, connect the plumes and assemble the phone in reverse order.

⚠️ Note: Replacement of sensors on models with AMOLED-Be careful with the screen (for example, Xiaomi 13 Pro) - damage to the matrix will lead to the inoperability of the display.

5. Sensitivity adjustment of the sensor

Some of the Xiaomi models (especially with the AMOLED-You can adjust the sensitivity of the sensor, and this is useful if you have a screen:

• 👆 The screen is too sensitive (responds to light touch or moisture).
• 👇 The sensor does not recognize pressures in gloves or with protective glass.
• ⚡ You need to optimize the response to games (for example, in the PUBG Mobile or Genshin Impact).

You can change the sensitivity through hidden settings:

1. Enable the Developer Mode (as described in Section 2).
2. Go to Settings → Additional → For developers.
3. Find the settings: Pointer location shows the coordinates of the touches (useful for diagnosis); Show touches shows the touch points on the screen; Touch sensitivity - sensitivity adjustment (not available on all models).

Some devices (such as Black Shark or POCO F series) have a separate menu for gamers:

1. Open Settings → Special features → Improved touch for games.
2. Activate High Sensitivity or FPS Mode.

To enable control through Scrcpy:

1. Download the program from the official website: scrcpy.github.io.
2. Connect your phone to your PC via USB and enable debugging via USB.
3. Run Scrcpy via command line: scrcpy --bit-rate 2M --max-fps 30

This will allow you to fully control the phone from your computer, including typing and running applications.

💡

If the sensor doesn't work, but the phone responds to the mouse that's connected, the problem is exactly with the touch module or its plume, and then the software won't work, we need a replacement.

FAQ: Answers to Frequent Questions