Lenovo vibe x3 is good phone at price around 20000. This phone is dual sim both 3g and 4G enabled but you have to choose between second sim and microsd card
It has 3gb ram which is decent for any phone
It has 32/64 gb internal memory which is a real deal
It comes with android 5.1 lollipop
It comes with built in processor snapdragon 808 and gpu 418
It has 21 mega pixel camera and 8 mega pixel front camera and a 3500 mah battery which gives good battery backup
This phone comes with dual front firing speakers and flagship smartphone from lenovo