I am using this phone since last 1.5 years.
Truely Based on WIndows.No Java Support.
Goona start talking with Battery backup & its functionality.
Battery backup is ok, long last wholeday ( if you not use much). In stand by mode you It long lasts 1 day.
Windows Store
Many famous apps like twitter, whatsapp, facebook, instagram are available there but not much feature like android apps. Many more are not available like tinder are not available on windows phone lover.
I buy it at cost of 15000.