As with owning a computer, just as now with a smartphone, I was a late adopter with cellphones.
My first one was an Alcatel One Touch 311:
http://www.dummy-sammler.de/pics/Alcatel%20OneTouch%20311.jpg It didn't last me long alas, after some 3 years or so the battery was broken, but when I replaced the battery it was only another year before the phone itself broke down.
My second one was a Nokia 1100:
http://www.nokiausers.net/wp-content/uploads/2011/04/Nokia-1100.jpg Very reliable phone and the battery lasts me almost a week. It stopped functioning well after 5 years or so, by which time it was out of production, so I bought one second hand.
This third one, the second hand Nokia 1100 I'm using still. The markings on the keyboard have faded, but I kept my original Nokia in a box and replaced the keyboard cover with the old one that remarkably wasn't faded.
This summer I bought my first smartphone, a Fairphone 2, which will leave the production line in november:
https://www.fairphone.com/phone/ Fairphone is founded by a Dutchman, Bas van Abel, who was active lobbying for fairer and more sustainable production of smartphones, as they tend to be frequently replaced (I'm shocked as to how many phones some people in this topic have used over the years - think about all the energy and resources that went into it), taking up lots minerals that are often from conflict-zones. Plus the world is about to face mineral shortages as well as an overheating climate.
https://www.fairphone.com/about/ When Bas van Abel met reactions saying fairer more sustainable production can't be done, he decided to start producing one himself, creating the Fairphone company. Their pillars are fourfold: striving to get all minerals to be mined conflict-free (not by leaving miners in the Congo without work, but striving to work with mines that aren't controlled by warlords), a phone that's designed to be repairable: you can take it apart and replace modules that broke down, the phone is expected to last 6 years - it's an expensive high-end one though for that reason -. Third it will be produced with a keen eye to worker's conditions and worker's rights in the chinese factory they've made a deal with. Fourth they're trying to create a cyclic process where phones can be returned, refurbished or recycled to create new Fairphones, thus closing the loop so we don't have to plunder the earth so much.
I had decided I didn't really want a smartphone for fear of security risks (phone getting hacked or stolen), but I got so very enthusiastic by how this company is trying to make more sustainable and fair electronics, that I decided to buy one and I hope one day they will extend their values and methods to things like tablets, laptops and desktop computers.