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"Which flagship phones with replaceable batteries can customers buy?"

Most of the Kyocera Duraforce line has this ability.

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Their latest and greatest PRO 3 runs a chip that was mid-range when it releases 4 years ago and only 6 GB of RAM. That is decidedly not a flagship.

My Kyocera will work in orbit and withstand intense radiation. In fact, this very moment my new Duraforce Pro 3 is having fun in a launch-testing thermal/vac chamber.

Kyocera's 'flagship' is high-reliability phones in absolute garbage environments.

Samsung's 'flagship' overheats and earns them class-action lawsuits.

Motorola's 'flagship' is a hinged throwback to the 90s.

Apple's 'flagship' is an overpriced piece of vendor lock-in.

Meanwhile my phone takes serious abuse and laughs at it. I've dropped it and watched it go more than 700 feet down the side of a mountain (Chambless Skarn) and BARELY chip the screen protector. Waterproofing still intact. Case barely scratched.

What you consider a flagship phone is a brittle piece of junk in my hands.


How does any of that prevent the phone from having the latest chip and copious ram?

Radiation hardening would do that

That's not a radiation hardened chip, it's regular off-the-shelf consumer electronics. The "solar radiation" test they advertise is part of MIL-STD-810H. It tests whether the electronics survive regular sunlight on earth. The only ionizing radiation this phone is rated for is UV light.

At least if it had registered memory there might be an argument that it has some radiation resistance, but no it's plain old LPDDR4x.

Ulefone Armor 29 Ultra has the same MIL-STD-810H conformance with "radiation hardening", 16GB of RAM and a flagship Dimensity 9300+. Just not a removable battery.


"The only ionizing radiation this phone is rated for is UV light."

Yet it is currently working just fine recording video inside of our rad/AtOx chamber with multiple Strontium-60/Barium-137 sources surrounding it.

"LPDDR4x."

Wrong. LPDDR5 and it has its own error correction features (not as robust as ECC but it's still there.)


> Yet it is currently working just fine recording video inside of our rad/AtOx chamber with multiple Strontium-60/Barium-137 sources surrounding it.

That's really neat, but doesn't contradict anything I said.

Also do you perhaps mean Strontium-90? ;)

> Wrong. LPDDR5 and it has its own error correction features (not as robust as ECC but it's still there.)

Their product page lists LPDDR4x: https://www.kyoceramobile.com/rugged-devices/duraforce-pro-3. Unless you have a better source I'm going with the manufacturer on this one.

> it has its own error correction features

Source?


>Their product page lists LPDDR4x

Funny because the Qualcomm sm7450-ab snapdragon 7 gen-1 page lists itself as only supporting LPDDR5.

>also do you mean perhaps Strontium-90?

Nope. Strontium-60. 25 year half life compared to Sr-90's ~29. It's what we like to use in real space-environment testing on the ground. Nasty stuff.

>source?

You can actually probe your hardware and see what sort of ECC is enabled on a Droid phone. In this case, in-line ECC, so that means some of the RAM is actually sacrificed for error correction instead of having a dedicated extra chip (256 bit, 240 of that is data 16 bit is error correction.) What's awesome about that is that enabling ECC is simply a bit flip in firmware and you don't need the extra RAM modules installed - the installed memory can already do it. You don't need the extra hardware.


> Funny because the Qualcomm sm7450-ab snapdragon 7 gen-1 page lists itself as only supporting LPDDR5.

Those pages contain scarce technical information, it would be silly to say that anything not listed there is explicitly not supported.

Qualcomm's leaked datasheet says it supports lpddr4x: https://www.scribd.com/document/868805341/80-26135-1-AE-SM74...

> Nope. Strontium-60. 25 year half life compared to Sr-90's ~29. It's what we like to use in real space-environment testing on the ground. Nasty stuff.

Strontium-60 doesn't exist. It falls completely off the isotope table (https://inframatterresearchcenter.org/IsotopeTable.html). Strontium-82 has a 25 day half-life.

> You can actually probe your hardware and see what sort of ECC is enabled on a Droid phone.

Care to share how? I wasn't able to find anything on the internet and I'd love to know whether my phone has some limited ECC.




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