If there is wrong localization firmware or for some reason you need to update to latest firmware you can use this package.

update_EM06-E_to_EM06-A.cmd changes modem to use latest American version
update_EM06-E_to_EM06-J.cmd changes modem to use latest Japan version
update_EM06-J_or_A_to_EM06-E.cmd changes modem to use latest Europe version