Dumbphones - handsets that just make calls and send texts - were set to disappear as technology moved on, but they have survived in emerging markets and among nostalgics of simpler devices in the West. Their continued appeal was underscored on Sunday in Barcelona on the sidelines of the Mobile World Congress, the world's biggest mobile expo, as Nokia unveiled a revamped version of its iconic 3310 model, more than a decade after it was phased out.
Dumbphones remain useful to telecoms operators to "relaunch or accelerate" mobile phone use as they are relatively inexpensive, said Julien Miniconi, a telecoms expert at consulting firm Wavestone.
"It makes sense especially in countries where the network is not great," he added.
Last year 1.5 billion smartphones were sold around the world, according to research firm Gartner.
But the dumbphone market is still significant, with nearly 400 million sold in 2016.
In certain emerging markets such as India, their sales still outstrip smartphones.
Basic phones accounted for over 55 percent of all mobiles sold the third quarter of 2016 in the world's second most populous country, according to the International Data Corporation, a market research firm.
And dumbphone sales are continuing to rise in this major market by about four percent per year.
Even in developed nations where the telecoms market is mature, the phones continue to sell. "Today they are niche markets, either for those looking for vintage or for those who are anti mobile internet or old people," said Thomas Husson, a mobile analyst at Forrester, a research group.
Young kids also use them as a first phone. Some people use them as secondary phone to lend to visiting friends and family from another country and avoid roaming charges.
British actor Eddie Redmayne, who won an Oscar in 2015 for his role as scientist Stephen Hawking in 'The Theory of Everything', made headlines as he became the latest in a growing band of smartphone refuseniks.
"It was a reaction against being glued permanently to my iPhone during waking hours. The deluge of emails was constant and I found myself trying to keep up in real time, at the expense of living in the moment," the 35-year-old said of his decision to go back to a less sophisticated phone.
Within any age group, it's not hard to find people who refuse to join the smartphone revolution.
"I have no interest in a smartphone - it's expensive, fragile and I don't see the use for it," said Sandrine, 39, a Paris-based illustrator.