Question: Is erase all contents and settings enough?
I want to know wether following Apple's steps before selling an iPhone 6 goes far enough in terms of data protection? I have read conflicted information about iPhone data recovery software and software used to wipe over the device again. Am I safe in thinking the iPhone data recovery software packages are useless, despite some "well known" Mac sites having reviewed these products. Admittedly, I also can't find any independent customer reviews of these types of software. Is it still the case that "erase all content and settings" is safe and it's not just a case of some unscrupulous character buying some $29.99 software to access all my supposedly deleted data.
Thanks in Advance
iPhone 6 Plus, iOS 10, null