Our Icon Tint cases are made using higher-grade plastics that include additional additives to help the material maintain it's color-stability over time, exposure to sunlight, or harsh chemicals. If a case does begin to yellow, this is usually the result of the natural aging process due to color transference and chemical reactions when exposed to excessive amounts of heat, UV light, and chemicals. The level of yellowing completely depends on using habits and the environments in which the phone case is used.
In the event your case does yellow due to wear and age, it is covered under the Quikcell 1-Year Limited Warranty. Please submit a request and we will be happy to assist and replace your item if needed.