I got curious about it and it seems the PIN is 06530, which according to https://www.tutorialspoint.com/letter-combinations-of-a-phon.... can be these combinations, which to my dismay are not very meaningful: ['mjd', 'mje', 'mjf', 'mkd', 'mke', 'mkf', 'mld', 'mle', 'mlf', 'njd', 'nje', 'njf', 'nkd', 'nke', 'nkf', 'nld', 'nle', 'nlf', 'ojd', 'oje', 'ojf', 'okd', 'oke', 'okf', 'old', 'ole', 'olf']

EDIT: I thought iOS PINs should be six digit?