Solution The following info gives understanding on modem firmware supporting FortiExtender model and region.
FortiExtender modem images can be found in below path: Login to https://support.fortinet.com, select 'Download', choose drop down and select 'Fortixtender' -> / FortiExtender/ MODEM-Firmware/ FEM_06-19.0.0-build0000-AMEU.out FEM06=>FEXT201 19.0.0-build0000 => Modem Build AMEU => North America and Europe region. FEM_12-19.1.0-build0001-WRLD.out FEM12 => FEXT-212, FEXT-211 19.1.0-build0001 => Modem Build WRLD => across globe but only for FEXT211, FEXT212
FEM_40D_AMEU-19.0.0-build0000-AMERICA.out FEM_40D_AMEU => FortiExtender-40D-AMEU 19.0.0-build0000 => Modem Build AMERICA => North America region
FEM_40D_AMEU-19.0.0-build0000-EUROPE.out FEM_40D_AMEU => FortiExtender-40D-AMEU 19.0.0-build0000 => Modem Build EUROPE => Europe region
FEM_40D_NAM-18.0.0-0000.out FEM_40D_NAM => FortiExtender-40D-NAM 18.0.0-0000 => Modem Build NAM is for North America region
FEM_40D_INTL-18.0.0-0000.out FEM_40D_INTL => FortiExtender-40D-INTL 18.0.0-0000 => Modem Build INTL is for all region except North America region
