help us on this subject
 

as we are new to the GSM field we have lot of doubts.pls help us experts on this

what is RPL file?

what is PM file?

what is ASK file?

what is super dongle data?

why phone get imei 123454321 or ????????????? after drop dammage or liqued dammage?

why need servers to PM authorication?

why we write pm file in BB5 phones with out field308?

what is the reason imei get 123454321 ilke in BB5 after flashing lower version?

what is modified PM?

can we write PM file reading from a same model phone?

what is the rereason sim lock invalid?

how about the cable counter?

on what situation we need to erase flash in BB5 phones?

what is the erase file in BB5 phones?

thank you