That's a definite maybe. It may work, or it may hard brick your phone (making it useless), or it may soft-brick it, meaning that you'll have to reflash it with Dubai firmware. It depends on whether the hardware is different between the two. (If it has the same last letter [say G925I], you can definitely flash Indian firmware to it, because that's the phone sold in Latin America, India and Australia, among other places. I don't know if yours is the G925F [Global] or something else, though [like 925I]. Look in About in Settings to see the model number.)