Apple has started shipping out special iPhones to help security researchers discover weaknesses in iOS. Apple announced its new Apple Security Research Device Program in July. However, they have only started rolling out the phones now.
Under the program terms, researchers get these special iPhones for a period of one year. They may extend the loan period. These iPhones are far less locked-down than regular iPhones. That makes it easier to find flaws that could help improve iOS security.