I just replaced my netgear g router with an offbrand one that is capable of N and my download speeds doubled on my iphone 3gs going form 6-7mbs to 12-14 mbs. Upload is the same with both routers. How is this possible? I thought the iphone 3gs was not equipped with an N compatible wireless chip. My computer upload speeds have only increased by 50% and it does have an N compatible wireless card.