In the Samsung Galaxy Ring teardown by iFixit, the conclusion is simple: this smart ring that costs $399/€449 for the metallic one and $249/€279 for the plastic one is useless the moment it breaks, or the battery dies.
For example, to remove the battery on the Galaxy Ring, you must effectively annihilate the device, and the rest of the components are soldered so tightly that it is almost impossible to do something with them. Disassembling the Galaxy Ring requires the use of epoxy solvent to dissolve the resin coating on the inside and the use of a pick to scrape it off.
I also came across a disassembly video of the Galaxy Ring and there is also a computed tomography (CT) scan of the device, and these are the best images of the guts of the device.
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Squeezing all those elements into as slim a form factor as the Galaxy Ring affords is a masterwork of engineering but as you will gather it is also its primary problem: everything is tightly enclosed and constructed to ensure you cannot perform maintenance.
Galaxy Ring is built on Nordic Semiconductor nRF5340 system on a chip with 2x Arm Cortex-M33 cores, 512 KB RAM and 1 MB storage and Bluetooth 5. 4 connectivity.
It also has a very small wireless charging coil and a battery pack just beside it, there is also a Near Field Communication tag, and an antenna for exchanging signals between the ring and the paired smartphone.
The fun part is that the charging coil located on the inner side of the Galaxy Ring is not soldered directly to the PCB as many other smart rings, but there is a press connector instead.
The best of this is that the PCB is cemented into the Galaxy Ring, which means the component cannot be replaced without dismantling the ring.
