Been four years since I had cell service or regularly carried any internet capable devices and I have never been happier.
My anxiety has plummeted and my attention span and productivity have skyrocketed. I do not have a phone as a security blanket anymore and feel so much more confident in public.
Smartphones are optional for most people, but if you are forced to carry one, keep it in airplane mode whenever possible and only use it when solving the specific problem that forces you to carry it that you lack any alternatives for.
If you need mobile entertainment buy a paper book.