Your Galaxy's hidden maintenance mode keeps repair technicians out of your personal data

Handing your phone over to a repair technician can be surprisingly uncomfortable. Even if you trust the person working on it, your Galaxy probably contains years' worth of photos, messages, accounts, documents, and other personal information that you don't want a stranger casually browsing. The problem is that a repair technician may need access to the device to diagnose or fix it, leaving you with an awkward choice between protecting your privacy and giving them the access they need.