As ubiquitous as Wi-Fi networks are, they're not everywhere, and open Wi-Fi access points designated for public use are becoming more and more rare every day. You can pay to subscribe to Wi-Fi networks, but that can be expensive over time—as can buying latte after latte at your local coffee shop. The cellular networks will sell you a USB or ExpressCard-based wireless modem for anywhere Internet access, but they'll charge you an extra monthly fee (usually in the $50 realm) for the privilege of this service. There's a better way, and it involves using your Windows Mobile phone in a way you might not have considered before: as a wireless modem.
There are two ways you can use your Windows Mobile phone as a wireless modem: