Alıntı: He told me he should have been already in the army, but they let him more time for exam.

if they granted him more time legally as he claimed then he should be able to travel abroad without any problems.

But the situation looks like so that he is illegally avoiding the military duty to have more study time. That is, officially he should already have been in the army by now, but running away intentionally. If this is he case, then he won't be able to go abroad, because he would get caught in the border or when he renews his passport as he is at the moment in a break out status. If this is the case, there is a good chance that he would get caught not only if he decides to leave the country but even in a local police check point (say in traffic checks).

In other words the problem is not related to whether to leave the country or not, whether to make a contact with an official and get caught or not.

So obviously no solution exists for this situation except performing his military duty..