Upgrade iPhone 12 64GB Storage to 256GB

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Video Introduction
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From the first iPhone to iPhone 11, Apple has stored serial number, WiFi address, and Bluetooth address on NAND. However, the NAND on iPhone 12 does not store serial number, WiFi address, and Bluetooth address, which means that the NAND of iPhone 12 can directly be replaced by an iPhone 12 NAND and activated.