Side By Side Comparison of Celkon S1 and Lenovo A5000. Compare Processor, display, RAM, Storage and other features here. You can quickly compare Celkon S1 and Lenovo A5000 smartphones just by looking at their ratings and results showing "winner" and "runner up." There is also a short analysis comparing different features of Celkon S1 and . You can also look at each hardware feature individually to perform your analysis while comparing mobile phones.