Default HTC one m8 problem update

I have HTC one m8 with stock Rom 1.54.901.10 cid 401 the problem is that , I had never saw 1 discuss where is described this model so someone can help me and can explain me the difference thanks !( I don't have recive the 4.4.3 update [emoji16] )

Inviato dal mio HTC One_M8