Default [Q] Flashing LG2 Modem on S5

Is it ok if I flashed the LG2 modem on my galaxy S5 G900P?

I want to change the SPC into 000000 by flashing LG2 modem and using QPST and then I will flash back the ND2 modem . Coz I tried changing it using the CMD method on DFS but it didn't work.

If someone knows another way to change the sps into 000000 please tell me

please help

THANKS