A Los Angeles Times reporter recently called me for advice about a $400 AT&T bill covering his iPhone activities while “roaming” in Vancouver, Canada, over a weekend. He wanted to know what could be done to reduce such charges while travelling outside his carrier’s home territory. He’s in luck: Truphone says today its planning to launch one solution later this year: Truphone Local Anywhere. It’s a single SIM service that provides local numbers across multiple carriers (internationally!) on a single handset. Bottom line: Road warriors and mobile professionals can avoid roaming-charge shock on international travel. It’s due to launch in the third quarter.