I've got a Samsung Rugby. All I use it for is to make calls. It does the job well. The main reason I got it was because it can withstand the beating that pulverize those flimsy plastic toys that passes for phones nowadays. A few months back, I was working on the roof, my wife told me I had a call. She chucked my phone on to the roof. I picked it up, talked for a while, dropped in 20 feet onto the ground and got back to work. Like the Timex of old, It takes a licking and keeps on ticking.
I'm going to switch to the Sonim XP1300 once my contract is up. I'm not a big fan of flip phones. XP1300 does everything the Rugby does (only better) and it's waterproof. That's the kind of phone I'll never have to replace.