[Xiaomi Redmi Note 7 Pro Guides, News, & Discussion] Panchajanya1999:
Hello !

Here is an easy guide to enable CA ( Carrier Aggregation ) in your violet. I won't be writing a long-ass guide, lets be on point.

There are two seperate files, one for Jio & Airtel and another for VI (vodafone-idea). This seperation is made because:

> The Jio-Airtel file has all combos for Jio, Airtel and VI. Few users arent getting CA on VI using this file.
> Hence, a new file optimised for VI only is being uploaded too. Theoritically this file should be fine for Airtel and Jio too but isnt tested.

tldr; If u have internet only on VI, use the VI optimised file. Else, use the other file.

Pre-requisites :

1. Brain and Patience

2. Windows 7 and higher ( I tested on 10 and 7 ) and 32-bit should work fine.

3. A rooted Q/R ROM

4. Network Signal Guru ( needs Permissive SELinux btw )

5. QPST Tool ( latest )

6. QDLoader HS-USB Driver [link] [64-bit] (look for 32-bit on internet)

7. Fully functional ADB

Telegram : [ For more support ]

Azure Kernel for Redmi N7p

Attached 00028874 File

[

updated 1-1-2021

]

Google Drive [ Optimised for Jio / Airtel users ]

Google Drive [ Optimised for only Vi users ]

Steps are Simple AF. Lets Start.

1. Install QDLoader HS-USB Driver. Alongside / beforehand keep your EFS backed up via Ofox/Pbrp or EFS Explorer ( u should be introduced to EFS soon along way ).

2. Connect your phone to PC, make sure ADB is working and USB Debugging is enabled !!

The next steps should be followed with your device properly connected to PC

3. Enable Diag mode for USB. Install Terminal on your Android and execute this command

su -c "setprop sys.usb.config diag,adb"

4. Launch Device Manager on PC. Under Ports (COM & LPT) , you will find Marshall London or Qualcomm HS-USB listed. I would suggest you to uninstall Qualcomm HS-USB and install the one I provided.

5. On your PC, launch QPST Configuration. You will see your device enlisted as SM6150 under Active Phones tab.

6. Head over to Start Clients > EFS Explorer section. A Phone Selection will pop-up. U will find your device there connected. Click OK button. Wait for a few seconds / minutes until your storage gets read. You will see a bouncing bar while the storage is being read.

NOTE - If you get errors like "The phone you have chosen does not support an embedded file system" , then probably you are damned. Either you are on R or you have missed drivers.

7. Now you got yourself landed in EFS Explorer. Head over to nv > item_files > rfnv .

You will see a lot of files named 0002xxxx . Don't worry xD ;) you need to deal with only one file.

Locate 00028874 and back it up to a safe place by clicking on it and selecting "Copy Data File to PC".

8. Now comes the real deal to be dealt with :) You need to replace the file 00028874 .

I will be providing you a modified file of 00028874 and you need to replace this with the original one, assuming you already backed up the original file as per Step 7 .

> Download the attached "modified" file.

> Delete the original file by clicking on it and then Delete

> After successful deletion of 00028874, right-click on empty space and "Copy Data File from PC" and select the downloaded "modified 00028874" , Upload it by selecting OK and keeping settings untouched. The downloaded file should not have any extensions !!

> Look in the folder if the file is successfully uploaded or not. It should have same atttributes as others.

9. After successful "operation" xD , disconnect your phone. REBOOT!!!

|| Look for the next post for verifying CA ||