Thanks to all of you, I know now what my friend was telling me (see part one).
We continued talking via Skype. After some nice messages about the utility of iron in our society, we decided to meet in 15 minutes. I arrived early, as usual.
I waited 20 minutes, then I received a strange SMS (he recharged his Nokia) :
(255) (153) (153) (255) (231) (129) (129) (153) (255)
When I asked him what was going on, he didn't answer me.
What did he send me?
Why is he late?
Where were we planning to meet?
Hint 1 :
Tags can help you.
Hint 2 :
Context is like size... it matters.
Hint 3 :
Stop looking for another hint! Do you think this is a game?