The security feature, designed to prevent use of lost or stolen devices, must be turned off before you buy a used iPhone.
iPhone fans, you can still take advantage of carriers' hot deals, but see the new devices in person to ensure you're getting the right one, says CNET's Marguerite Reardon in this edition of Ask Maggie.
The market for used iPhones has always been hot compared with other mobile devices, but it's gotten even more active since the new iPhone 6 was introduced this week.
All other new iPhones will pale in comparison to the Falcon luxury iPhone 6, a gold-plated beast with a massive rock attached to the back.
Now could be the best time to get the most buyback value for your old iPhone before the iPhone 6 officially launches and prices drop. Crave's Eric Mack has done some of the research for you.
What else is Carroll University going to study other than the various characteristics of those who choose dogs over cats? And vice versa.
Gazelle is offering to lock in prices for used iPhones until October 1, after the next iPhone is rumored to hit stores.
Values for used Galaxy S smartphones have increased recently, but they’ll soon start dropping. CNET’s Marguerite Reardon explains in Ask Maggie why now is a good time to sell.
In this edition of Ask Maggie, CNET's Marguerite Reardon asked the trade-in site Gazelle to offer some data about which smartphones retain their values best over time.
Six tips to know before converting your old electronics into cash.