Typically Iphones use way less data than android phones, due to software constraints apple places on them to appease the carriers. 20 MB file download limit over 3g in app store and over the web, wifi offloading through automatic switching when in range of wifi, etc. Android phones unless set up by carrier, do not have these limits. I routinely download several hundred meg podcasts on my nexus, and use over 5 gb a month. This has been mentioned several times on TWIT and other podcasts. Sprint was thrilled when iPhone was purchased, as they want to see the traffic go down as well. Recently at&t sent me a warning that my "unauthorized" tethering caused them to switch my plan. So I called up and told I do not tether, and kept my unlimited plan, as long as no more tethering detected. Ready for an upgrade on phone, as my nexus one is getting old, and as I am still paying to subsidize a phone purchase I have not made through plan prices.