I was forced to change device, the main problem was not the yellow background, it is overshadowed by the touch that makes the phone non-functional.

The colors are yellowish and indeed you need to have the brightness a bit higher to see well, which consumes more battery. Purchased together with the frame for 50€, easy and quick installation (less than 30 minutes) and everything works fine, just like on a mobile phone about 4 years old. Generally, there are various imitations on the market and they all have the same constant problems, such as poor brightness and bad colors.

However, if you want a phone that doesn't fall behind in anything compared to today's market (worth 150-250€), then it is just what you need. The screen does have some flickering and you need to lock and unlock it again to make it stop. Time will tell for the rest.

Update 12/2022: After two months, some pixels on the screen burned out!

Update 01/2023: In the end, I had to change my phone as it broke again without me realizing it, it's a really poor imitation after all. Besides the color and touch issues, it is not at all durable.