Facebook founder Mark Zuckerberg said: "I grew up with the internet, but only a third of the world is on it today. We are really close to the beginning of this. The majority of people in the world have never seen anything like what you and I would call a computer."
Facebook's bold new look for Android becomes available from April 12.
More top news
A primary school has taken action after pupils brought in an variety of "worrying" packed lunches - including a two-day-old McDonalds.
A 30-year-old man was arrested in Birmingham on Sunday on suspicion of preparing terrorist acts.
Two students and their climbing instructor are feared dead after an avalanche hit a school party in Japan.