When the program started, Apple wouldn't accept any iPhones on trade if they had a broken screen. However, Apple started accepting models with "reasonable damage" earlier this year, making a physical visit to a Store perhaps less important. The program starts at around $32 for a 16GB iPhone 6s and runs up to $45 for a 128GB 6s Plus, and all subscribers be enrolled in AppleCare+ (which covers your broken screen, by the way). It's only available online in the US for now, but we've reached out to see if it's coming to the UK and elsewhere later.