Wired: FBI hasn't cracked the encryption on Mayor Adams' iphone (after a year)

…the FBI still hasn’t cracked the encryption on Adams’ personal phone, nearly a year after it was seized

Adams had not only changed the passcode on the phone from a four digit PIN to six digits—a measure he says he took to prevent staffers from intentionally or unintentionally deleting information from the device. He also claims he immediately “forgot” that code to unlock it.

Lockdown mode perhaps?

Likely BFU mode and they haven’t been able to bypass the rate limiting of the secure element yet.