How to open the CIT hardware test on a Xiaomi phone (HyperOS 3)

Device

Android

Shown on

Xiaomi Redmi Note 15 Pro 5G (25080RABDG), HyperOS 3.0.308.0, Android 16

App

Settings

Path

Settings › About phone › Detailed info and specs

Real screenshots

6 of 6 steps

Checked

October 2026

Sources

0 official, 1 other, linked below

Step by step

1. 

   Open Detailed info and specs

   Go to Settings, About phone, Detailed info and specs.

   Done

2. 

   Tap Kernel version five times

   Tap Kernel version five times quickly. This picture was taken after four taps: the page is still open. The fifth tap opened CIT.

   Done

3. 

   Pick a test

   The hardware test list opens: Version info, SIM card test, NFC Test, Touch sensor, Display test and more. Tap a test to run it.

   Done

4. 

   Follow the test

   The Display test fills the screen with one colour at a time. Look for dead pixels or marks, then tap NEXT.

   Done

5. 

   Mark the result

   After the last colour, the test ends on a screen with Pass, Retest and Fail. Tap Pass if the screen looked right, Fail if not, or Retest to see the colours again.

   Done

6. 

   Or use the dial code

   In the Phone app, dial *#*#6484#*#*. On our phone the same hardware test list opened.

   Done

If you do not see this option

• Nothing happens after four taps? Our phone needed five. Tap quickly, or use the dial code *#*#6484#*#*.
• Dial code does nothing? Type it in the Phone app's keypad. Xataka lists *#*#6484#*#* for Xiaomi phones; it worked on ours. Source: How to open Xiaomi's secret menu to check your phone works

If this does not work

• Not sure what to tap at the end? The result screen has three buttons: Pass, Retest and Fail. We only looked at it and tapped none of them.
• A test fails? Tap Retest to run it again before you judge the phone. A failed test points to the part to have checked.

About this guide

CIT is a hidden test menu for checking a phone's hardware, useful before buying a used phone. Our phone opened it after five taps on Kernel version, and with a dial code.

The screenshots are from our Redmi Note 15 Pro 5G with Xiaomi HyperOS 3.0.308.0 and Android 16, in Light mode. We ran only the display test, tapped nothing on its result screen, and left without changing anything.

Good to know

IMEI and model are on the same pages: how to find the IMEI on a Xiaomi phone.

In short: Settings, About phone, Detailed info and specs, tap Kernel version five times. Or dial *#*#6484#*#*.