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Joined 1 year ago
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Cake day: June 21st, 2023

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  • I want a metal back phone

    Steve Jobs did too, they still needed a plastic window for some antennae on the OG iPhone, then went to full plastic. It has become worse now, the back isn’t just for wireless charging. It is also for NFC, UWB, and often cellular/gps/wifi/bluetooth may share antenna connections through the back.

    Right there with you though. NFC could probably be packed in a band at the top of a phone. UWB seems of dubious value thus far.








  • It started as a hardware problem and doesn’t seem to be slowing down. LTE needed more and larger antennae for lower frequencies than older tech. Four cellular antennae are now pretty standard. Then you have wifi, Bluetooth (which can share if they can TDM), wireless charging, NFC, ultra wideband, GNSS. Then the chips are so powerful they need heat dissipation systems installed (or just lame thermal throttling like what Apple does.)

    The modems require more power, (especially at the beginning of LTE) which means bigger batteries. LTE and NR have reduced range compared to the older narrowband technologies, so the phone needs to use more power to transmit, especially when carriers like Verizon didn’t backfill cell sites to compensate for the reduced coverage.

    Then, cameras, one wasn’t enough, 4 or 5 are very common now (usually 3 primary and depth or low res sensors for aiming.)

    When tablets became popular, many people decided to just have a large phone screen rather than a tablet, further entrenching the size.

    The tech is more mature now, a 2-antenna MIMO antenna for cellular would suffice, albeit at the expense of network performance. Likewise one camera with a depth sensor would work, although mobile photography would be more limited. Dropping some limited-use items like wireless charging and ultra wideband could further shrink space.

    So it would be possible now, but as others here have mentioned, the supply side focuses on larger hardware.

    Ironically, at this point I’d almost prefer a smart watch with LTE and stop carrying a phone altogether. However, the aforementioned antenna issue makes it so watches generally have poor to unusable signal, poor battery life in cellular mode, no camera, and the 5G NR low power spec/chips aren’t fully done yet, so it’s LTE only on them, which, with carriers transitioning to 5G will make it so watches can only access a handful of congested bands.

    Also, that device manufacturers tend to design smart watches to be companion devices to a smartphone rather than primary makes that concept’s execution problematic.

    Another idea I had that was anti small phone but huge battery boost was to just bring a backpack or a satchel or whatever. Carry a full sized tablet around, and use a Bluetooth headset for calls. However, tablets are also often crippled by carriers/manufacturers so they can’t do common things like SMS or voice calls, and Apple has basically monopolized that market.


  • I know how it is. Used to work on phone chipsets. That being said, I have no idea how pixel 8 is doing this, but likely the Bluetooth chipset has a mode it can go into to behave like AirTags and just pulse out a BTLE beacon occasionally with both the main OS and sub-OSes turned off and power just being trickled to VCC on the BT chip.

    Edit: apologies, didn’t mean to sound so curt. Tl;dr: I know how bootloaders run to allow battery charge while off, not sure how pixel 8 is doing their magic-to-be but have a good theory.








  • Can add too, until it can send in almost any wireless situation like SMS can, it isn’t worth bothering with. SMS can send on LTE even when a phone doesn’t have a data connection available to the userspace. (Bars but no G icon.) It can send on 2G or above practically instantly. (Although once T-Mobile turns off 2G next year, less of a concern in the US.) SMS is just a raw simple control channel message. RCS is, as others mentioned, just another over-the-top messenger with all the network stack overhead, and a buggy one.

    One can fire off an emergency SMS on the side of a mountain with barely usable signal that won’t even work for a voice call. RCS would fail in such an environment.

    MMS, of course, requires a carrier APN data connection to work, and is a bit slower and more finicky. RCS would definitely be an improvement there.