I am looking to upgrade from a regular cellular telephone to a smart phone. I travel frequently, so am looking for something that is global (works on multiple frequencies) and is unlocked (so I can purchase a local sim card when traveling to avoid roaming charges). I am fairly agnostic about the carrier, but verizon probably has the best coverage in my area. I am also somewhat flexible on price, and would be willing to pay a bit more for the phone itself in order to avoid getting locked into a two year plan. Wifi is an interesting feature to save on data charges. Other features (camera etc) are less important (but may be used for skype). I hope to use the phone to listen to music / podcasts, internet surf and do email. Any advice is appreciated. Thanks!