BlackBerry is finally bringing back the physical keyboard.

The company has ditched the touchscreen typing in its new phones and instead swapped it for the kind of technology that was found in the BlackBerrys and other phones of old.

BlackBerry is apparently hoping to bring back its ailing fortunes with the new mobile, which runs on Android but looks a lot like the phones it made when it was more popular.

The new BlackBerry Key One is displayed at the Mobile World Congress centre in Barcelona on February 25, 2017, before the start of the world's biggest mobile fair, held from February 22 to February 25 (JOSEP LAGO/AFP/Getty Images)

It's just one of a range of retro technologies that have been revived at the Mobile World Congress. Nokia also announced that it would start making its 3310 again, with some updates – and Samsung announced it would make a stylus that looks like a Steadtler pencil of the kind people used at school.

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BlackBerry is making the new phone in league with a new manufacturer, TCL. Together they announced the new phone that runs on Android and includes a physical keyboard built into the bottom.

It comes just weeks after it emerged that BlackBerry's share of the mobile phone market is officially zero, marking the end of a decline that saw it fall from being the company that arguably kickstarted the smartphone.

Nokia is also being resurrected by a new manufacturer, HMD Global. It restarted the 3310 by revamping it slightly – including adding a new colour screen – but keeping many of the same headline features, including its lengthy battery life and rugged build.

HMD Global also hopes to use the new Nokia phone to bring the brand back into the public consciousness by seizing on the desire for retro technology. It then hopes to sell its more modern phones, three of which it released at the event.

The new Nokia 3310: Everything you need to know

"HMD must balance two competing brand goals with its new handsets," he said.