Smartphone in Every Hand

Will there be a day when every human on the planet can have access to a smartphone?  And an internet connection?

I’ve been thinking about applying my love for entrepreneurship and technology to social enterprise.  I have multiple enterprise ideas that could impact worldwide social problems, but only if the world had access to technology, internet, smartphones, and electricity. 

When do you think the entire world will have access to these things?  And, if everyone could access them, what would you do or create to help?