I just bought a Nokia 3310 3G and plan to curb my smartphone use completely. I'm sick to death of looking at my phone being the only thing I do. I used to do things at night, projects, hobbies, meeting people, and going places. I drive places now via GPS and have no recollection of how I got there. Driving without GPS makes you actually look at your surroundings and enjoy them and start making mental maps again. That all stopped as smartphones took over my life. It almost feels like schizophrenia being connected at all times to all things, all people, and all information. It reminds me of the Black Shakes (Nerve Attenuation Syndrome) disorder from Johnny Mnemonic.
I have received the phone but can't use it yet because my sim hasn't come in the mail. It's tantalizing to not be able to turn off my smartphone just yet. But I can feel the freedom when I hold that dumbphone Nokia.