Diag Mode in Xiaomi HyperOS 3 Free Tool Download - 2026

Easy Way to Turn On Diag Mode in Xiaomi HyperOS 3

If you fix Xiaomi phones, you may have noticed something new. After the HyperOS 3 update, turning on Diag mode is not as easy as before. Many repair people got confused. The old method stopped working.

Don’t worry. Let’s talk about it in a simple way so anyone can understand.

What Is Diag Mode and Why It Matters?

Diag mode is a hidden repair option inside Xiaomi phones. Normal users never need it. It is mainly for repair work.

When a phone shows problems like no signal, no service, or missing IMEI, the technician needs Diag mode to fix it. Without turning this mode on, the computer cannot properly talk to the phone’s network part.

Before HyperOS 3, things were easy. You just typed a secret code in the dial pad. A hidden menu opened. You enabled Diag mode. Done.

But now Xiaomi has changed things.

What Changed in HyperOS 3?

In HyperOS 3, Xiaomi made the system more secure. The old dial codes do not open Diag mode like before. The option is still there, but it is hidden deeper inside the phone.

Because of this, many technicians thought the feature was removed. But it is not removed. It is just protected better.

Now people are using a simple tool called HyperOS 3 Diag Enabler Pro to turn it on easily. This tool opens the hidden setting with just a few clicks. It saves time and avoids confusion.

How to Turn On Diag Mode (Simple Steps)

Here is the easy way:

1. Turn on the phone.
2. Go to Settings and enable Developer Options.
3. Turn on USB Debugging.
4. Connect the phone to your computer with a USB cable.
5. Unlock the phone and allow permission.
6. Open the Diag tool on your computer.
7. Click “Check Device” to confirm connection.
8. Click the button to open the hidden menu.
9. Enable Diag mode.
10. Restart the phone after finishing your work.

That’s it. Simple and clear.

Real-Life Example

Think of Diag mode like a secret repair room inside a house. The house looks normal from outside. But if there is a serious wiring problem, the electrician needs to open that hidden room.

Without opening that room, he cannot fix the main issue.

Diag mode works the same way. It lets the repair person access the phone’s inner network system.

Why This Is Useful

Here are some benefits:

• Saves time in repair work
• No need to remember secret codes
• Easy to use
• Helpful for HyperOS 3 devices
• Makes deep repair possible

For busy repair shops, this makes daily work much easier.

Download Link

HyperOS 3 Diag Enabler Pro - MediaFire | GitHub

FAQs

1. Does this fix IMEI automatically?
No. It only turns on Diag mode. You still need repair software to fix the issue.

2. Is it safe to use?
Yes, if used properly for repair purposes.

3. Do normal users need this?
No. Regular phone users do not need Diag mode.

4. Will it work on non-Xiaomi phones?
No. It is made for Xiaomi devices only.

5. What if the phone is not detected?
Check your USB cable. Make sure USB Debugging is on. Also allow permission on the phone screen.

HyperOS 3 made things a little harder for repair people. But with the right steps, the job becomes easy again. If you work with Xiaomi phones, understanding Diag mode is very important.

Hope this made everything clear for you.