Well, Nokia is probably only GSM handset manufacturer who has their own baseband implementation. Modern S60 are smartphones that are implemented in same way as

Well, Nokia is probably only GSM handset manufacturer who has their own baseband implementation. Modern S60 are smartphones that are implemented in same way as normal feature phones and thus incredibly energy-efficient (and relatively cheap). I think that this level of technical know-how can get them very far - even in today's market.