Hey everyone! Just been browsing lately, dont think anyone even knows me

dont get alot of time to post!
Anyways!
Im really worried about a friend....he hasnt been in contact for a few days, normally replies as soon as i contact him etc, he isnt even answering his phone to unknown numbers, VERY unlike him!! So i dont think its just me his ignoring?
His been back for iraq (his in army) for few weeks and i havent heard from him since sunday morning.... and im getting pretty worried!!
Dont want to look obsessive and ask all his mates, but gahhh just hope he is ok!!!
Im going to leave it a few days before contacting someone, im sure if something had happened i would have heard by now,...just dunno what else it could be!! Maybe his lost his phone...again?!!
I text him yesterday and today and no reply, have also tried phoning him..