In what way are watches with SIMs (or eSIMs) not just tiny cell phones? Or is you meaning that the modern smartphone is itself a “pile of hacks sitting on top of hacks”?

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sulam an hour ago | parent [-]

The main way is that literally zero of these watches actually meet the standards that the cell networks require of a cell phone. Every single one of them has a carrier exemption or a lower standard to adhere to, because it turns out that putting a cell phone's RF package into a watch is super hard, both because of size and the various negative effects of the human body on radio signals. This affects cell phones too of course, but less so (remember the iPhone 4 and how we were "holding it wrong"?).

Another way is that watch chipsets are distinct from cell phone chipsets in that they make a variety of compromises unique to wearable requirements. Apple may be an exception here, you can't get a spec sheet for their chip, but for the other providers their wearable chipsets are generations behind anything they sell for a cell phone and are compromised in terms of power. Interestingly even watches (Apple, Samsung soon) that support 5G are running a dumbed down version of 5G that was created specifically to support the wearables and IoT market.

It gets even stranger in software. A text showing up on your watch might have arrived two completely different ways depending on whether it's an iMessage or a regular text and you can't tell which. The watch often doesn't even have its own number -- it's borrowing your phone's. IOW, it's not a tiny phone doing phone things, it's a companion device trying to fake it.

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TazeTSchnitzel 28 minutes ago | parent | next [-]

A few years ago, I signed up for an Apple Watch eSIM plan (which is a special type of eSIM plan that Apple make cell carriers agree to offer as an add-on to a normal cell subscription for your iPhone, and there is no other way go get an eSIM for it).

I then started regularly receiving phone calls (to my iPhone) intended for someone else. At first I thought it was a wrong number or an old number and kept telling them to remove this number. Buy the calls kept coming and I eventually I dared to ask what number they had dialed. And it wasn't a cell number I recognised.

After contacting support for my carrier, what I figured out was that the Apple Watch eSIM has its own phone number, for some reason, but it's not one you're supposed to know about; as an extension of your phone's subscription, the Apple Watch eSIM notionally has the same number as it. But they were calling the secret number associated with the eSIM, somehow. And I think there was a problem in the number routing table somewhere, because I think this number may have been in use with another cell carrier, and the calls only went to me when calling from my network?

Absurd nightmare situation.

	▲	Melatonic 2 minutes ago \| parent [-]
		Or opportunity for fun Surprises you didn't give that secret number out - could have been fun for yourself (or your close friends or family) to be able to call direct. I wonder if you could even use it for texts or notifications that only go to the watch ?

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izacus 31 minutes ago | parent | prev [-]

What do you mean by "carrier exception"? Exception from policies those same carriers set up decades ago?

	▲	sulam 23 minutes ago \| parent [-]
		Not exactly. Early cell watches were not going to meet the existing carrier standards and so they received specific exemptions from the carrier to operate on their network. Over the years the carriers have created requirements that are specifically for these devices, that are less stringent than what they require for a cell phone on their network. They still give specific exemptions if a watch is "close" to meeting a requirement but can't quite get there.