If a technician replaces an EEPROM or reballs the Qualcomm CPU, the IMEI data may need to be re-injected from the original box label.
: Click Start or Write . Once the tool indicates "Pass" or "Success," reboot your phone and check your IMEI by dialing *#06# . Important Safety & Legal Warning qualcomm smartphone write imei tool v1.01 latest 2017
Modifying EFS or NVRAM partitions carries risks. It is standard practice for technicians to back up the existing QCN (Qualcomm Calibration Network) file using tools like QPST before attempting to write a new IMEI.
There are two methods: