The document compares the Apple iPhone and T-Mobile G1 mobile phones. It outlines the prices, data plans, features and specifications of each phone. The iPhone costs $199-299 with a 2-year contract and has no required data plan, while the G1 costs $179.99 with contract or $399.99 without. Key features of the iPhone include GPS, enterprise support, an App Store, 8-16GB storage and Bluetooth, while the G1 has 1GB memory, Google apps and search but no Bluetooth. In conclusion, the iPhone offers more memory, applications and overall usability.