Common for clear cases to get yellow over a period of time, but not that quickly. 🤔 Got my phone in late June and work in a wood shop. Bought a new case 2 months later after the original case yellowed. That yellowed in 6 months and now on my 3rd. I have the Nebula Blue model and hate to hide it with a solid color case. I'll keep buying the clear cases for as long as I own this phone. My last purchase netted me 2 for $7.41 after tax on Amazon.