Originally Posted by spabood
ok i understand you
but there is any way to change firmware ??
and if i cant does there same original custom rom becuase when i lunch my sm-n900s show sk telcom not samsung??
i tested this on youtube but not worked for me i installed the same firmware
youtube.com/watch?v=tdf10OWlMDQ sorry gays im not allowed to post links
If you are not using cutom rom that means your boot logo will not change.
First flash Original Firmware then after root your mobile flash custom recovery twrp.
After done all procedure you are capable of flashing any custom rom.
Most important step after flashing custom rom flash kernel of perticular model only.