Samsung Electronics Co. (005930) became the best-selling smartphone brand in the U.S. in May, T. Michael Walkley, an analyst at Canaccord Genuity Inc., wrote in a report this week. “Selling used phones is one way to do that.” 
 
 To contact the reporter on this story: Peter Burrows in San Francisco at pburrows@bloomberg.net 
 
 To contact the editor responsible for this story: Tom Giles at tgiles5@bloomberg.net
– You know that ancient iPhone 4 from 2011 that you're still saddled with? Well, multiple sources tell Bloomberg that you'll soon be able to trade it in for a discount on the shiny and (relatively) new iPhone 5. It's the first time Apple has allowed such a thing, notes Rebecca Greenfield on the Atlantic Wire; she thinks it's a result of just how much Apple's market positioning has dropped lately—and how scared it is of Samsung. Under the program, said to launch this month, Bloomberg predicts that customers with working iPhone 4 or 4S models may be able to get a basic iPhone 5 for no money down.