[GUIDE] Fix No Network Signal Error in Mi Note/Pro

Hello Mi Note/Pro Users,

Today I'm here to solve the problem of No network signal error in your Mi Note/Pro by giving you a simple tutorial that you can do it yourself easily. Note: This tutorial can be used for both Mi Note/Pro.The steps are same, but make sure you use the correct file for your device.


For this tutorial we need some things, so let's get the things ready before starting the tutorial

1. We need Mi Flash Tool. So Download MIUI Rom Flashing Tool and install it in your computer.


2. Download the Modem file for your device: For Mi Note: Click here. For Mi Note Pro: Click here. The zip that you downloaded needs to be extracted to get the modem file. The modem file that you get after extracting the zip file would be named like this NON-HLOS.bin

Now let's get started.

1. Turn off your phone and enter your phone into fastboot mode. (For entering into fastboot mode, Press volume - and Power button together until you see the fastboot image on your phone.
   


2. After entering the phone into fastboot mode, Connect your phone to the computer.


3. Since you have installed MIUI Flashing tool, go the Android folder of the MIUI ROM Flashing tool, ie C:\Program Files (x86)\Xiaomi\MiPhone\Google\Android. MIUI ROM Flashing tool will be installed to the above location by default.
   
   


4. Copy and Paste the modem file (NON-HLOS.bin) to the folder mentioned in the above step. Some times your pc will ask to provide administrator permission to paste the modem file to the above mentioned folder like this:
   
   


5. Press continue and the file will be copied and pasted to the folder C:\Program Files (x86)\Xiaomi\MiPhone\Google\Android.


6. Hold down the left Shift key on your keyboard and right click inside this folder and then select Open command window here.
   This will launch the command prompt screen like this.
   
   
   
   


7. Type the command fastboot flash modem NON-HLOS.bin and press the Enter key to flash the modem like the one in the screenshot below. The screenshot below is actually of the Redmi 2 phone, so for Mi Note/Pro it will be slightly different. The modem will be flashed successfully and type in fastboot reboot to reboot your phone.
   
   
   


8. Your network should be back after that. Enjoy.
   

Source

Special thanks to @Technoking2020
The modem files for this tutorial of MI Note/Pro are extracted from the fastboot developer rom of the respective devices.