It is Very important to have the Stock and Official Updates for your Samsung Galaxy S 5 SM-G900FD, Below you can get the one that suits to your Smartphone, Many versions, Countries, And Languages are available too, All These are Stock Softwares from this Source.
Free Download Links for Samsung Galaxy S 5 SM-G900FD Softwares:
G900FDXXU1ANF6_DOJV1ANF4_XSG_United Arab Emirates_4.4.2_KitKat.zip - 1.4 GB G900FDXXU1ANF7_OJV1ANF7_XSG_United Arab Emirates_4.4.2_KitKat.zip - 1.4 GB