Use full information:

[lucazz]

in Samsung this file called EEPROM (electronically erasable programmable read only memory)

in Nokia this file called PM (Permanent memory)

in LG its called NVM (non voltile memory)

#QCN And #NV definition and its purpose in a smartphone!
##### QCN file ? #####

QCN = Qualcomm Calibration Network

** if phone efs erased, wiped, phone calibration erased and phone
not see network/not see 4g/3g/2g/lte then you should write qcn file
to solve those problem.#You can write QCN only if phone modem work'

::::::#you can remove the problem (emergency call only) with QCN:::::::

##### NV file ? #####

NV = NewViews accounting for DOS database file.

**If phone is security damaged , you must be suffered nv data damage/corrupt.

** NV file is non volatile memory. this file store the memory without voltage support.
when you disconnect the battery and put it again the time of the mobile changed, time
need continuous voltages.When you you remove the battery set security code not changed
that means it don't required voltages in NV . Such memories are saved which don't
requrire voltages like
"security code
"network code
"profile setting
"network calibration
"incoming/ outgoing call records
contacts
.....You use this file for network.

 

[raixie]

maraming salamat sa useful info mo sir dagdag kaalaman