What are the differences between the iPhone 4 and the iPhone 3GS?
What are the differences between the iPhone 4 (AT&T/GSM) and the iPhone 4 (Verizon/CDMA)? Which one should I buy?
What are the differences between the service plans offered by AT&T and Verizon for the iPhone 4? What is the total cost of ownership on each carrier? Which is the best deal for me?
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 does the iPhone 4 (CDMA/Verizon) speed compare to the iPhone 4 (GSM/AT&T) model? Which is faster?
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?
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) and the iPhone Troubleshooting & Repair Q&A (Home). For other Apple hardware, visit the EveryMac.com Q&A section.