Hello. The Xiaomi 15 Ultra is designed with a fiberglass battery cover and a metal middle frame, which are carefully integrated to provide both durability and aesthetic appeal. The deep integration of these materials can sometimes create visual differences in how the device looks from various angles.
Due to the different reflection properties and glossiness of the fiberglass and metal surfaces, light interacts with these materials in different ways. This can create an optical illusion where the gap between the battery cover and middle frame appears more pronounced when viewed from certain angles, especially under specific lighting conditions.
This is a normal characteristic of the design and manufacturing process. It is not a defect or a quality issue but rather a result of the materials used and the way light reflects off them. The phone undergoes strict professional inspection before leaving the factory to ensure it meets Xiaomi's high standards for both performance and quality. Please rest assured to use it.