Use a high-quality data cable to ensure a stable connection.
If you see "IMEI null" or "Invalid IMEI" when dialing *#06# , your phone won’t connect to any mobile network. Flashing rewrites the NVRAM (Non-Volatile Random Access Memory) and restores the IMEI.
: Look for the Karbonn_K140_Pop_Flash_File.zip . It should contain a file ending in .pac .
: Check your cable and ensure the SPD drivers are correctly installed in the Device Manager.
