More than three in four US (77%) smartphone owners say resale value was either not influential ... The reasons consumers provided for not selling old phones varied, but the results indicate ...

About 20 percent of people reported not selling their old phones because "they're lazy ... Trade them in. Almost all cell phone retailers will let customers bring in their old smartphones ...

When it comes to the resale value of old mobile phones, condition is everything. A phone in pristine condition is already a valuable asset, but having the original packaging can push the price even ...

Many people keep old ... a lot of value and together at a global level represent massive volumes," WEEE director general Pascal Leroy said. There are an estimated 16 billion mobile phones ...