Design and Build
The Celkon S1 features a relatively slim profile with dimensions of 144 x 71 x 8.9 mm and a weight of just 137 grams, making it comfortable to hold in hand. The design is typical of the period, with a front display taking up about 67.4% of the body. It supports a dual-SIM configuration, a feature appealing to users who need to manage two numbers simultaneously, often for separate personal and work purposes.