Mobile World Congress day one: here's what you need to know

Mobile World Congress (MWC) has returned. This is what you need to know from day one. 
Smartphone launches dominated headlines. Nokia revealed it was bringing back another old smartphone. Only it isn't, licencees HMD Global are, and the company wants you to pay attention to its new line of devices. Pekka Rantala, HMD Global executive vice president and chief marketing officer told The Drum there is more than nostalgia on offer at the company that looks to pay respect to