[Lenovo K6 / K6 Power / K6 Note Guides, News, & Dis] theflyingrahul:
Hi all,

I just wanted to share what I did when I had a few problems with my Lenovo K6 Note - karatep.

What did I do which ruined my phone?

I unlocked my bootloader, still on stock ROM, haven't installed TWRP yet.

Since then no calls on non-VoLTE network like Vodafone/Airtel/BSNL.

Primary SIM doesn't connect to any other network than 4G.

I had installed CM15.1 ROM with TWRP and Magisk root and I had the same network issues.

When should you follow this guide?

You have problems with network connectivity where you can't make calls on 3G or 2G network.

Primary (data) slot doesn't connect to 3G or 2G.

No signal on either one slot or both the slots.

IMEI shown as null or 0.

WiFi and Bluetooth address either different or shown as unavailable.

Rebooting to fastboot and performing "fastboot erase modemst1; fastboot erase modemst2" didn't work for you and lost your IMEI and/or WiFi and Bluetooth address.

Do not reboot to fastboot and execute "fastboot erase modemst1; fastboot erase modemst2". I lost my IMEI and MAC because of this.

Requirements:

1. Your phone needs to have root access.

2. Your original IMEI numbers and WiFi address, you can find them from your phone's packaging box.

If you don't have your IMEI, better use an IMEI from an old/dead phone of yours. Don't google this up, there can be blacklisted IMEIs.

Steps:

Preparing the .QCN file for restoration

Download and install UltraEdit (you can google up this for the link)

Download and install Qualcomm QPST/QFIL downloader (google it again)

Download IMEI Converter (find it in the attachments below)

Download .QCN file (find it in attachments, this is for Lenovo K6 Note - karatep)

Get your IMEI (for both the slots), WiFi and Bluetooth addresses

Open IMEI Converter and type your IMEI. You will get the hexcode for your IMEI, get the hexcode for both of your IMEIs. Copy the hexcodes.

Open the .QCN file with UltraEdit and search for "08 8A 11 11 11 11 11 11 11" (without the quotes). This is the dummy IMEI in the file, you have to replace it with your phone's IMEI.

In UltraEdit, goto find and replace, search for 08 8A 11 11 11 11 11 11 11 and replace it with your IMEI's hexcode. You have to replace the first hexcode with the hexcode for your second slot's IMEI and the second hexcode with the hexcode for your first slot's IMEI.

Search for AA AA AA AA AA AA and replace it with your WiFi MAC address, this has to update your Bluetooth address as well, there are four places where you have to replace it with your WiFi MAC address.

Save the .QCN file and close UltraEdit.

Enabling DIAG COM port on your phone to download .QCN to your phone

Execute in command prompt.

This will enable the diagnostic port on your phone.

Restoring .QCN to your phone

Open QFIL as administrator.

Connect your phone to your computer, keep your phone powered on with DIAG port enabled.

Goto Tools -> QCN Backup Restore

Browse your edited .QCN file

Don't change SPC code - leave it as such.

Select Enable Multi-SIM.

Click on Restore QCN.

This will take some time, once done, restart your phone.

Voila! Your IMEI, WiFi and Bluetooth addresses should be updated and network should be able to receive signal and place calls.

Please feel free to reach me if you run into any issues, I'll try my best to help you!

Thanks,

tfr!