G900w8 unlock error (0) 6.0.1

Hi
I have G900w8 6.0.1 for unlock ..
Here is the log!!
Code:

Reading phone info...
 Reading IMEI... OK
 IMEI: 3523080xxxxxxxx
 Unlocking... error (0)


I read about downgrading modem to LP but want to ask will it mess the imei and baseband ?
And i also need the MM only CP to revert my phone when i flash LP modem
Thanks
Br !!