Why Nokia keeps launching retro smartphones at Mobile World Congress

Nokia has caused waves at Mobile World Congress (MWC) in Barcelona with another reimagining of its classic phones, this time the 8110 flip phone. 
Nokia's Finnish partner, HMD Global, is largely constructed from former Nokia executives. Under licence, it produces Nokia smartphones to give retro models a second run in the modern mobile market. 
In 2017, HMD used MWC to revive the stout and trustworthy Nokia 3310, a headline grabbing-stunt that stood ou