Flashing only the modem will not alter efs afaik
sent from the state where marijuanated muffins are NOT illegal !
OF COURSE!!! It change the EFS. I came from XXEMG4 and couldn't flash UFME7 without error (no mobile data) because of the new EFS format. Afte restore an old EFS backup it was possible....
SO BACKUP YOUR EFS OR YOU COULD LOST YOUR IMEI!!!! Take secounds. O