Buying a second-hand mobile phone can save you money and shop more sustainably. But it's important to understand exactly what you're getting into – and to consider important issues such as security ...

Forrester Research?s largest annual survey of Americans? technology adoption finds that 73 percent of the 37,000 respondents claim the mobile phone is the electronic device they use the most.

Buying a used phone can save you a lot of money and is greener than buying new. But is it safe? Andrew is CNET's go-to guy for product coverage and lead photographer for Europe. When not testing ...