On S60 there was no separate baseband chip to my understanding, the Symbian kernel was responsible of driving the radio as well. This was said to give Nokia a c

On S60 there was no separate baseband chip to my understanding, the Symbian kernel was responsible of driving the radio as well. This was said to give Nokia a competitive advantage, as most of the competing smartphone OSes required separate baseband chip with a firmware of its own, which drove costs up back then. Such chips are inside SoCs of course these days and cost next to nothing anyway.