Apple has unveiled a new tool for users to help determine whether an iPhone, iPad, or iPod touch is configured to use Activation Lock. The page works much like the tools used by carriers such as AT&T to determine whether a potential trade-in device was protected with the feature. You enter the IMEI or serial number of the device, fill in a CAPTCHA, and press “Continue” to get your results (via iDownloadblog).
If the device is protected, you’ll find instructions for disabling the security measure before selling it. You’ll also find help for removing a used device from another user’s account, in the event that you were sold a phone and the original owner had not disabled it (of course, all of those options involve contacting the previous owner and having them do it, for security purposes).