You get my point thought regardless of the example, Oracle doesn't make phones, and Samsung doesn't make game consoles.
Here is a quote from Jobs: People think focus means saying yes to the thing you’ve got to focus on. But that’s not what it means at all. It means saying no to the hundred other good ideas that there are. You have to pick carefully.
And can you give an example and cite how Apple tried and failed to enter B2B?