British carrier O2 announced plans to sell a flagship HTC phone without a charger two months ago, and the results of that experiment are in. After selling the HTC One X+ with just a Micro USB cable for three months, it turns out that 82 percent of customers elected not to buy a separate wall charger with the phone. That's beyond the carrier's expectations — it had predicted that 70 percent of customers wouldn't need the extra charger in the box.

In a statement, O2's chief executive Ronan Dunne said that the results should prompt other carriers to make similar moves for the sake of the environment; it's estimated that there are over 100 million unused chargers in the UK. O2, for its part, has pledged to stop selling phones with chargers by 2015.