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Apple iPhone XS and XS Max might support 802.11ax (Wi-Fi 6)

Discussion in 'General Wireless Discussion' started by Balance, Oct 9, 2018.

  1. Balance

    Balance Regular Contributor

    Sep 4, 2017
    According to Tech Insights the new iPhones use a Broadcom BCM4377 Wi-Fi/Bluetooth wireless combo SoC. The BCM4377 is not publicly listed, and probably custom made for Apple. The closest related however is the BCM4375, also a Wi-Fi/Bluetooth combo chip. And it supports 802.11ax (recently branded as Wi-Fi 6 by the Wi-Fi Alliance).

    Dual-Band 802.11ax Wi-Fi/Bluetooth 5.0+ Combo Chip
    The BCM4375 simultaneously implements two streams of 802.11ax with Bluetooth 5.0+ to enable Wi-Fi speeds up to 1.429 Gb/s on mobile devices such as smartphones and tablets.

    • Support for two streams of 802.11ax
    • Bluetooth 5.0+ including Low-Energy Long Range (LELR)
    • Real Simultaneous Dual-Band (RSDB)
    • 1.429 Gbps PHY rate
    • 1024 QAM modulation
    • OFDMA
    • MU-MIMO
    Internet Man and psychopomp1 like this.
  2. Internet Man

    Internet Man Senior Member

    Sep 1, 2017
    It looks like BCM4377 is stamped over BCM4359 in the image from Tech Insights. The BCM4359 is a 2x2 802.11ac chip for smartphones. Some details are available on AnandTech. The BCM4361 and BCM4371 were also 2x2 802.11ac parts with the BCM4361 (Samsung Galaxy S8) having BT 5.0. I wouldn't assume that the BCM4377 is a revised BCM4375 quite yet.

    The Test Report document at the FCC says, "There are two vendors of the WiFi/Bluetooth radio modules: variant 1 and variant 2. The Wi-Fi/Bluetooth radio modules have the same mechanical outline (e.g., the same package dimension and pin-out layout), use the same on-board antenna matching circuit, have an identical antenna structure, and are built and tested to conform to the same specifications and to operate within the same tolerances."

    I wonder if this refers to the BCM4359 and BCM4377. It may also refer to identical packages from USI and Broadcom.
    Last edited: Oct 9, 2018