Note:
Changing of imei is prohibited in some countries do it at your own risk.
Download Spreadtrum drivers from here
Enable USB Debugging on the device and connect it to your computer
Wait for moborobo to connect with the device
Wait for moborobo to connect with the device
Launch WriteIMEI
Click Mode Sel and tick Normal Mode
Type in the imei on the desired sim port and click write.
you will see a success message confirming imei change. Reboot your phone for it to take effect