I don't think I could.

Even if I did, I wouldn't choose to live like that, because of all the things I can do with  smartphone and, above all, the internet.

Without them, I would have to:

- talk to the phone while I'm driving

- call people during their working or sleeping hours for something that can be solved with a message

- write traditional letters to customers (and wait for weeks) instead of sending emails

- wait for the printed versions of official announcements (and waste valuable time) instead of going to the official website 

- go to bus-stops early and wait for a long time, instead of looking at tables online.

- guess the weather and carry/ not carry an umbrella

- lose half of my professional opportunities, which don't exist  outside the internet

- stop lifelong learning, because it is a torture without internet

- rely on local stores for goods and hope they have variety and good prices

- stop a lot of activities that I am doing online and/or on a smartphone(e.g. watching foreign television, reading e-books, listening to music)

- spend a lot on communications instead of using free messaging options.

I'm sure there are dozens more things that I would miss, but  I think the above are enough to make my point