So when is microsoft going to sue apple..

Yeah, I don't think MS is going to sue Apple. Apple MIGHT try to sue MS but not any time soon. Microsoft has been making Smartphones a lot longer than Apple. They also file more patents and have a MUCH larger patent portfolio. Being in similar businesses there's a real good chance that MS could find something that Apple infringes on. Apple has a lot more to lose in that sort of skirmish than Microsoft does. They aren't going to risk it unless WP starts eating their marketshare.
 
Yeah, I don't think MS is going to sue Apple. Apple MIGHT try to sue MS but not any time soon. Microsoft has been making Smartphones a lot longer than Apple. They also file more patents and have a MUCH larger patent portfolio. Being in similar businesses there's a real good chance that MS could find something that Apple infringes on. Apple has a lot more to lose in that sort of skirmish than Microsoft does. They aren't going to risk it unless WP starts eating their marketshare.

What, pray-tell, would Apple be able to sue MSFT over? I swear half of Apples patents would never actually hold up in court.