After the first Snowden leaks, I went without any phone at all for years - Some of the nicest of my life too, albeit, a very solitary life.
After the first week once the addictive panic of disconnection wears off, a deep tranquility I didn't realize was possible sets in.
Unfortunately certain aspects of modernity are no longer possible without this device - Totally bogus.
But yeah, cellphone use and this level of jackedinness is a problem.
Backups though.. always backup everything and often.