Yu Yuphoria is the best budget Android phone under 6000/-. This phone has Cyanogen OS 12.1 Android5.1.1 Lollipop out of the box. The 8MP primary camera takes very good photos even in low light and the front 5MP camera is also good for taking selfies.
The phone has 1.4 GHZ Qualcomm snapdragon Quad core CPU and RAM of 2GB so you can play High end HD Games and can do multitasking without any problem. The 5 inch Display has Corning gorilla Glass 3 protection so forget about scratches. Also this phone has first charge 1.0 so u can charge your phone in no time:D