A clever fellow by the name of John, not our John, has figured out how to avoid ridiculous roaming charges when traveling abroad by simply taking out his SIM card. Yes, this negates any possibility of using the phone, but you can at least use the Wi-Fi to browse the web and check e-mail. Simple, yet very effective.

When Travelling Internationally, Pop Out The iPhone SIM Card To Check Email Without Huge Roaming Charges [Consumerist]