Hello and welcome to Android Central Elsedik Rahmani!
The non 4G/LTE model, G900H, is only sold in a limited number of countries and unlike all the other Galaxy S5's worldwide, it has a Exynos octa core chipset that requires a whole different firmware from the international models on the Qualcoomm quad core chipset. See #1.3 of 42 Galaxy S5 models - Dummies Guide.
Samsung has started rolling out Marshmallow to the, "H", model about 11 days ago. So far, Kazakhstan, India (INU) and Panama have been updated.