Design and Build
The LG U400 exhibits a compact and robust design with dimensions of 99.8 x 48 x 20.4 mm, making it comfortable to hold and use with one hand. Weighing in at 114 grams, the device strikes a balance between being solid enough to convey durability while remaining light enough for everyday use. The body supports a Mini-SIM, which was standard for phones during this period. The phone was available in two classic colors—black and silver—adding a touch of elegance and style to its sturdy build.