Qualcomm did it once. A SAW filter had hermetic seal issue or something and Wi-Fi modems lost voice in matters of months. Quite a lot of Android phones around 2010-2012 were affected. Virtually none of manufacturers took actions based on that information.
replyI believe that is actually a Broadcom chip, originally BCM43455.
replyIt's the same chip, renamed (which is silly) after the Broadcom IoT division was bought by Cypress, which is bought by Infineon. So technically, it's the Infineon CYW43455 (formerly Broadcom BCM43455).
replyWhile the SoC maybe different, the FW on the Wireless SOC could be similar.
replyYes, so different SoC, same WiFi, same issues, isolating the issues to the WiFi chip (common denominator). Carrier was also ruled out since I tried a custom and Raspberry offical one.
replyNo, i mean the problem could be in the Wireless FW, not Wireless chip, which mean it can be patched.
replyI wonder how feasible decompilation is. The firmware is used in many boards. An open, cleanroom reimplementation (derriving hardware details from the firmware, then reimplementing cleanly in embedded C++ or rust) could fix the issues, that would be very interesting.
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