There is no official Samsung S7562 4.4.4 firmware . If you see a file claiming to be official Samsung 4.4.4, it is either a mislabeled stock ROM or a repackaged custom ROM.
A: No. Samsung never released KitKat for this device. Any website claiming “official Samsung 4.4.4” is lying. samsung s7562 flash file 4.4.4 download