Most phones have built-in data modems, and most of the major carriers support the feature. To dial up the Internet, all you need is a connection kit (usually a data cable and software available from your carrier) that connects your cell phone to your laptop, your ISP information (this varies from mobile to mobile, so contact your provider for details), and a data plan. For the most part, data speeds aren't much faster than a 56Kbps dial-up modem's, but carriers such as Verizon have introduced 3G services with broadband speeds ranging from 144Kbps to a possible 2Mbps per second.