Amazon.com: Apple iPhone 4 16GB (Black) - AT&T: Cell Phones & Accessories

The front is flat and made of glass. The back is anodized aluminum. The Home button contains Touch ID. There's a True Tone LED flash on the back and a SIM tray on the right side that holds a "fourth form factor" (4FF) or nano-SIM card. The IMEI is etched

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