Hello!
Here is an easy guide to enable CA ( Carrier Aggregation ) in your device. I won't be writing a long-ass guide, let's be on point.
Pre-requisites :
1. Brain and Patience2. 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. Install QualcomDrivers [64-bit] [32-bit]
7. Fully functional ADB
Telegram : [ @techhnoob ]
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, Install QualcomDriversr. Alongside / beforehand keep your EFS backed up via Ofox/Pbrp or EFS Explorer ( u should be introduced to EFS soon along the 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 the PC
3. Open cmd inside ADB folder and type ADB shell hit enter
Type su hit enter and grant superuser permission from phone popup
Code:
" setprop sys.usb.config rndis,diag,adb "
4. Launch Device Manager on PC. Under Ports (COM & LPT), you will find Qualcomm USB listed. I would suggest you uninstall Qualcomm driver's and install the one I provided.
5. On your PC, launch QPST Configuration as administrator. You will see your device enlisted as SM6150
4. Launch Device Manager on PC. Under Ports (COM & LPT), you will find Qualcomm USB listed. I would suggest you uninstall Qualcomm driver's and install the one I provided.
5. On your PC, launch QPST Configuration as administrator. You will see your device enlisted as SM6150
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 with 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 the same attributes as others.
9. After successful "operation" xD, disconnect your phone. REBOOT!!!
10. If u don't see 4g+ then from the Signal Guru app click on Lock Bands->LTE->Select all bands(still not then sorry either your area or device at fault)
NOTES:
1)If a phone is not detecting the majority of times it is driver issues so reinstall driver's 2)Try reinstalling requirement QPST Tool ( latest ) and restart
3)This works on all Qualcomm devices supporting Carrier Aggregation