Yes and in that context it’s surprising it’s not higher. More interesting would be the conditions of those without a cell phone. And probably error bars matter here more than usual. Like is this statistically different than 100%,99.9%,etc?
A lot of the rest is probably older people who only use a landline, people in nursing homes, etc.
https://www.nytimes.com/2011/01/03/us/03prisoners.html
https://www.forbes.com/sites/walterpavlo/2020/04/19/will-cel...
The largest demographic without a cell phone is the 65+ age group. Only 61% of the people in that group have a smart phone.
My guess for the condition of those people? Elderly people living in nursing homes, possibly not mentally able to learn enough to use a smartphone, or possibly happy to just use a tablet for apps and games, and a dumb phone for calls.
Honestly, if you're so old that you only rarely leave the house, then an iPad and a landline already is almost as good as a cell phone is, since you'll always be close enough to your wireless phone in your small nursing home or house, and the iPad covers all the actual uses of smart phones just fine (tiktok, whatsapp, playing candy crush, checking email... which I think is 100% of the usage of smartphones, right?)
He does have an EPIRB and paper maps though.
Sounds like you just don't meet many elderly people.
So there is this one couple who saw that my parents were using iPads and so they learned that one could use these even at their age.
Fast forward a few years and the husband of that couple is firmly into Q anon