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.
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.