If are planning to buy a smart phone, don’t always go for looks. There are several things you need to know. The screen size and battery capacity should match, like if you buy a 5 inch screen smart phone, then the battery should be around 3000 to 4000 MAH.
RAM should be atleast 2 GB. Internal storage must be atleast 16 GB. These are the basic requirement that you should give priorities to.