When our youngest daughter was in high school( and it wasn't that long ago. She graduated in 2012) she'd bring friends home and they'd stare at my land like What the heck is that? Duh, it's a phone! It was amazing how many kids had never seen a house phone land line!
That's sort of how people are with my husband's flip phone. He's required for his job to carry an iPhone(hates the darn thing. It's pre-Siri and his fingers are too big for the touch key board) and before that it was the Blackberry(hated that. It was bulky in his pocket). He likes his little flip phone. It's light weight. It fits nicely into a pocket and it doesn't have technology he doesn't want. He could care less that it was the free giveaway at the phone store when we upgraded our family plan and the sale's clerk sort of laughed at him(iPhone, iPhone, iPhone, iPhone... flip phone?) or that when we're out and he answers a call, people stare at it like What the heck is that?
Technology changes really quickly these days, so for books I've written as recently as 10 years ago, I go back to refresh the technology. Change terms from Mobile phone to Cell...etc... but when I was editing The Signature I saw that Devon Howard carried a flip phone, it made me smile, made me think of my husband, so I left it. I expected during the BETA reads for someone to say something about that. Authors are very nit picky when reviewing other other authors' work. Didn't matter, I would have left the flip phone. Devon is a flip phone kind of guy.
The Girl on the Half Shell