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This phone is broken (broken screen) and was given to me, so I figured I'd use it as a WiFi extender, but I guess I can't.
this post was submitted on 09 Jun 2025
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Mildly Infuriating
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I've only seen that option on phones with two radios, it uses the 2.4GHz radio for one connection and the 5GHz radio for the other
I am not entirely sure what kind of radio fuckery happens, but my phone (Oneplus 6 with LineageOS) can be connected to a 5 Ghz wifi network and have a 5 GHz hotspot open at the same time.
I am assuming the wifi chip has two (or more) somewhat independent frontends, since my home wifi and the phone hotspot are on two different 5 GHz frequencies.
That's kinda required. I doubt one antenna can simultaneously send and receive.
Anyway, there's still only one controller, so your bandwidth is still halved.
An antenna can absolutely send and receive at the same time. It's called duplex .
Oh, I should clarify; this is more than send and receive - there's some amount of network routing involved with being a Wi-Fi extender or relay or whatever.
What I probably meant to say is one antenna cannot send/receive simultaneously on more than one network.
But, yes, duh, thank you for calling me out on that one!
I am not sure if the bandwidth is really limited by the controller, or by the modulation / signal-to-noise ratios in practical scenarios.