Just now on another thread i was ranting about this problem: 1) No smartphone has multiple sims so most of us end out carrying several phones (I have five); 2) Even if you carry multiple sims and just swap them in the same phone (I do that for a couple of countries with my iPhone 4) the phone address books wil not adapt to dialing prefixes and telephone list conventions; 3) Almost all, including iPhone store numbers according to the convention of the language you choose, not the country you're in; 4) Zero way to have true multi-currency plastic card function. I have credit cards from only three countries (I just closed two) but even airlines cannot accomodate different cards by country; 5) Just try to synch email, Apple Store, Amazon etc by country. Big problems; 6) There are so many more issues... Am I one of only a few people affected by this? P.S. Years ago I developed a credit card that would automatically bill against up to twenty different currencies/accounts thus simplifying life for global travelers. It worked a dream for a handful of Private Banking customers, and was never offered anywhere else. I loved it! ..but I never managed to use it myself. After a merger the bank dropped the product and a few customers were infuriated. Today I'd pay a small fortune for such a card instead of my briefcase full of wallets/cards/ID's for each country.