You are a high-flying corporate with a smartphone worth a lakh of rupees or so. Maybe white-collar employee or a college student who saved up for this premium cellular phone. Irrespective of the reason, the cell phone needs a pocket where it not only fits in, but is also safe from immediate hazards like water and dust. Also, you will need storage for your wallet, spare keys etc. In the current situation, add in a mask and sanitizer.