[Q] Samsung Galaxy S5 EYAL_MOBILE topic

My friend got his new Galaxy S5 and he wanted to root it. But his phone says it has 2 versions ( G900W8 / G900T ).
He tried to root with both versions, but no success.
His android version is 4.2.2_EYAL_MOBILE.
Can someone tell me what I should do in order to root his phone?