Follow this method to restore the original IMEI of P715
Before starting note down both the IMEI of your phone from the box or backside of your phone. Make sure you have turned on USB DEBUGGING, Drivers installed and Having Stock Firmware which is Rooted.
Required Tools:
IMEI_DUEL.qcn
Adb
QPST Tools
HxD Hex Editor
IMEI Converter
1) Download IMEI_DUEL.qcn and place it on Desktop
2) Install and open HxD Hex Editor. Drag and drop IMEI_DUEL.qcn to HxD.
3) Open IMEI-Converter and enter your IMEI and convert it you will get hex code, note it down. Do similar for second IMEI.
4) Now we have the hex code of both IMEI which starts with "08". On HxD Hex Editor Press "Ctrl+G"
Enter "23848" in Offset and click ok. Start Typing your FIRST IMEI Hex code.
Enter "20F0" again in offset. Now start typing your SECOND IMEI Hex code.
Save it.
5) Now open CMD and locate Adb. Run the following command
Code:
adb shell
su
dd if=/dev/zero of=/dev/block/mmcblk0p6
reboot
6) After phone gets reboot, Connect Phone to PC and select USB Tethering(No need to share net. Just keep it without pressing cancel or ok)
7) Open QPST Configuration and add new port, Uncheck Show Serial and USB and Select the "LGE AndroidNet USB Serial Port" click on Ok.
View attachment 3838608
View attachment 3838616
8) Open QPST Software Download, goto "Restore" tab. Check if the port has Detected the device, Browse QCN File that we saved before on step 4. Check "Allow phone/file ESN mismatch and Click "Start" to begin flash.
View attachment 3838617
View attachment 3838618
9) Wait for the device to Reboot. Check your IMEI (*#06#) Original IMEI have been Restrored.
Credits:
Neutrondev for most part of the guide
XDA-00 for Reference thread and files