. RamJhigini , i agree. The other hindrance i see is the 2.4Ghz unlicensed , shared spectrum that WiFi uses in contrast to the licensed spectrum G's use. pros: less policy management/ licensing - eventually reduces cost cons: Take care of the interferences! That would be nasty if you had to worry abt microwaves and other appliances! QoS then will be another problem! There are plenty phones already in market providing support for both of 'em. I do see a future where a city is totally WiFi [ ubiquitous network connectivity ] and a decentralized service with 802.11 phones. Well, Apple's iPhone seems to be on its way. Nokia is not far behind.