Comment on I hate Samsung and their dumb software design choices, and this is one of them. Why do I need a SIM card to enable a hotspot whereas every other phone works without one?

• turbowafflz@lemmy.world ⁨5⁩ ⁨days⁩ ago

  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

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  • LH0ezVT@sh.itjust.works ⁨4⁩ ⁨days⁩ ago

    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.

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  • forrgott@lemm.ee ⁨5⁩ ⁨days⁩ ago

    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.

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    • lurch@sh.itjust.works ⁨5⁩ ⁨days⁩ ago

      An antenna can absolutely send and receive at the same time. It’s called duplex .

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      • forrgott@lemm.ee ⁨5⁩ ⁨days⁩ ago

        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.

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    • LH0ezVT@sh.itjust.works ⁨4⁩ ⁨days⁩ ago

      I am not sure if the bandwidth is really limited by the controller, or by the modulation / signal-to-noise ratios in practical scenarios.

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