What does Nokia have to do with 3G?
That would be Qualcomm, not Nokia. From what I understand, Apple uses its manufacturer as middleman (Foxconn). Foxconn pays the license fee to Qualcomm, drawing from the price it charges Apple.
Apple then purchases the iPhone from Foxconn, and sells it at full price.
Apparently, Nokia holds a patent on GSM technology, for a span of 25 years - it's Monsanto all over again.
It is interesting to note, however, that Nokia reported its first net loss in October, while Apple beat Wall Street estimates for sales and profits, partly because of the iPhone's success.
Apple reported a 25% increase in third-quarter revenue, compared with a 20% drop for Nokia.
In retrospect, Nokia deciding to sue, now, is somewhat analogous to waiting for one's house to burn all the way down before calling the fire department.
They really should have called when they first smelled smoke, if they didn't want this to come across as insurance fraud.