: Using a tool like UMT (QcFire) , the technician selects the "Flash" option but ensures the OEMInfo and NV (IMEI) partitions are not overwritten.
: For a completely "dead" device that does not respond to power, you must open the back cover and short specific Test Points on the motherboard to force the phone into 9008 EDL Mode . This allows professional tools to communicate directly with the Qualcomm chipset for low-level repairs. : Using a tool like UMT (QcFire) ,
: Tools like UMT Dongle , Unlock Tool , and HCU Client are standard for this model. These tools can flash specific firmware sections while protecting the oeminfo and nvram partitions, which hold your IMEI and factory settings. : Using a tool like UMT (QcFire) ,