What are the differences between the iPhone 4 and the iPhone 3GS?
What new features are offered by iOS 4? How much does it cost? Is it free?
Can you purchase the iPhone models "unlocked"?
What are the "pros and cons" of the iPhone 4? Is the iPhone 4 "worth it" for me?
How much faster is the iPhone 4 than earlier iPhone models? How does it compare to the iPad?
Which iPhone, iPod touch and iPad models fully support iOS 4? Which models partially support iOS 4? For models that "partially" support iOS 4, which features are and are not supported?
What is the battery life of the iPhone 4 in "real-world" tests? Is the battery replaceable?
What is "FaceTime"? What devices are compatible with FaceTime? How well does FaceTime work in "real-world" use?
What are the AT&T Wireless voice/data plans for the iPhone 4? What is the least expensive option? What is the total cost of ownership?
How do the cameras in the iPhone 4 compare to the camera in earlier iPhone models? Does the iPhone 4 provide a camera that is "good" for my needs?
For all iPhone Q&As, check out the iPhone Q&A (Home). For other Apple hardware, visit the EveryMac.com Q&A section.