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Changes to Step #22

Edit by Geoff Wacker

Edit approved by Geoff Wacker

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[* black] More ICs on the back of the logic board.
[* red] Qualcomm WFR1620 receive-only companion chip
[* icon_note] Qualcomm [https://www.qualcomm.com/media/documents/files/the-qualcomm-difference.pdf|states|new_window=true] that the WFR1620 is "required for implementation of carrier aggregation with WTR1625L."
[* orange] Qualcomm PM8019 power management IC
[* yellow] Texas Instruments 343S0694 touch transmitter
[* green] AMS AS3923 boosted NFC tag front end
[* icon_note] We believe that this is simply a small revision of the AMS [http://www.ams.com/eng/RF-products/RFID/AS3922|AS3922|new_window=true], which allows "payment functionality in ultra-small form factors such as SIM and µSD".
[* green] AMS AS3923 boosted NFC tag front end
[* icon_note] We believe that this is simply a small revision of the AMS [http://www.ams.com/eng/RF-products/RFID/AS3922|AS3922|new_window=true], which allows "payment functionality in ultra-small form factors such as SIM and µSD".