Well, yeah, Nokia WAS a conglomerate that made all kinds of things like paper, electricity generation, cables, rubber boots, tyres, PC clone computers, and whatnot. But in the early 1990'ies all the rest were spun off and since then Nokia has been focused on the telecom business.
This is not correct. Nokian Tyres was spun off Nokia already in 1988, it was listed in 1995 and Nokia sold its remaining shares in 2003. Nokian Tyres is still listed in Helsinki stock exchange.
Currently Nokia is focusing on mobile networks and patent licensing.
https://en.wikipedia.org/wiki/Nokia#History