The Nothing Phone 4a Pro is nearly unbreakable, except for one design flaw

The Nothing Phone 4a Pro held up well in scratch, flame, and bend tests.

Its CNC-milled aluminum unibody was especially impressive for structural toughness.

But a poorly placed microphone opening may let a SIM tool damage the water-resistant mesh.

That makes the phone look unusually durable for the price, while leaving a real-world water-protection concern.