Significant discoloration after only 2 days

The cases look fabulous and are also good for the mobile phone.
BUT: I was aware that I can not expect all too much for the price and that White discolored over time. But the case with the butterflies looks to me after only 2 days when I would have been at least 4 weeks at a cell phone. Here, the mobile phone was in the 2 days mostly in the pocket. I would therefore not recommend.