Connectivity problems on newest Apple gadgets – can't link to Wi-Fi on channel 155 using 80MHz bandwidth
Connectivity problems on newest Apple gadgets – can't link to Wi-Fi on channel 155 using 80MHz bandwidth
Hi everyone, I’ve noticed that when I let my router auto-choose the channel and bandwidth, as Apple recommends in this guide https://support.apple.com/en-us/HT202068, my Apple gadgets can display Wi-Fi but fail to connect. The issues started with my iPhone 13 Pro, iPad Mini 6, and iPad Pro 12.9 2021, while my Android device (Xiaomi 10) works perfectly. After some research, I discovered the router automatically picks channel 155 with an 80MHz bandwidth. This channel disappears when I manually change it to channel 48 or lower the bandwidth to 40MHz. Although the problem seems resolved, I’m curious about the cause and whether others have faced similar challenges. P.S. All my devices are purchased and used in the UK.
Which router model and brand are you using? It seems the wireless chipsets on your iOS gadgets are unusual. Also, note that as bandwidth increases, wider channels reduce coverage because power is directed elsewhere. If your devices are near weak signals, they won’t connect. Your Android device likely has a better chipset for stronger reception.
For reference, Apple is mistaken here—I wouldn't suggest using Auto. Most routers don't adhere to channel rules and will overlap existing channels without any justification. As for why this approach failed, Channel 155 operates on Band C and has only recently become permissible in the UK without a license. Consequently, many makers didn't pursue certification for these bands, leaving them unavailable. My Access Point even blocks Band C entirely because Zyxel won't re-certify it due to potential conflicts, despite my intention to use it for compatible devices.