No man, that wasn't Gus on the phone. It sounded like Mike to me, I had to hear it again to make sure it wasn't Gus and it sounded like Mike to me.
But I asked myself.."where did the blood on Mikes coat come from?"
Why did he tell Walt that he'll never see Gus ever again?
and why the new policy?
I think Mike already took care of Gus, that's my theory .
I'm also thinking that Jesse will have the Mexican chick move in with him, because after the party he had, he also noticed that at the end he's alone in a way and needs someone around him to talk about his problems.
That's just my theory on everything, but it was a great episode..the story still being build up...