The rapid development of technology leads to frequent personal turnover of mobile phones. About 50 percent of users in China change to a new phone every 18 months, according to Chinanews.
However, alongside the high replacement rate is a low recycling rate. China now has about one billion unused mobile phones, but only two percent have been recycled with most of the rejected devices improperly handled.
“废旧手机”指被废弃的、老旧的手机，所以英文可以用old and discarded cellphones表示，也可简称为discarded phones。