Several days after my mother died in a car accident, my two sisters and I sat together in her apartment, stunned and overwhelmed. High on our horrible to-do list — along with retrieving her smashed vehicle from the tow lot, making burial plans and meeting with the rabbi — was this: getting into her cellphone.

Everything we needed to get her affairs in order was on her phone. Her contacts would tell us who to reach out to about the memorial service. Her email would tell us whether she had made plans we needed to cancel. Her finance apps would tell us whether she had been paying bills electronically. And there would be personal information, too. Her texts to family and friends. Her notepad. Her photos. The e-book she had been reading on the flight home in the hours before the accident as she left the Tulsa International Airport.

Luckily, Mom had given me the passcode to her phone only a month before. When we felt ready, I turned on her iPhone in itspink plastic case and typed in the code.

Nothing.

I typed in the code a second time. Again, nothing. My sisters and I looked at one another. A tightness gripped my stomach as I realized that the code Mom had given me couldn’t possibly work: That code had contained four digits, and her phone was asking for six.