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[* black] A little heat (a lot of heat) and a little prying yields two boards for the price of one! We split one of the iPhone 12 boards open to get a look at all that sweet silicon, and if it seems hard to guess which one, you're not alone—the logic boards of the 12 and 12 Pro are nearly identical, apart from a few serial numbers.
[* red] Apple APL1W01 A14 Bionic SoC, layered over Micron D9XMR RAMMT53D512M64D4UA-046 XT:F 4 GB LPDDR4 SDRAM
[* red] Apple APL1W01 A14 Bionic SoC, layered over Micron D9XMR RAMMT53D512M64D4UA-046 XT:F 4 GB LPDDR4 SDRAM
[* orange] KICM224AY4402TWNA12029, likely 64 GB of Samsung flash storage.
[* yellow] Qualcomm [https://www.techinsights.com/blog/analysis-qualcomms-snapdragon-sdr865-transceiver-supporting-5g-sub-6-ghz-and-lte-services|SDR865|new_window=true] 5G and LTE transceiver
[* green] Qualcomm [https://www.qualcomm.com/products/snapdragon-x55-5g-modem|SDX55M|new_window=true] 5G modem-RF system and SMR526 intermediate frequency IC
[* light_blue] USI/Apple [https://www.ifixit.com/News/inside-the-tech-in-apples-ultra-wideband-u1-chip|U1|new_window=true] ultra-wideband chip
[* blue] Avago 8200 high/mid power amplifier with integrated duplexer
[* violet] Apple APL109 4343S00437 PMIC