Windows 8 very good mobile yaha bahuth aachi mobile h ismay android ki tara nahi is phone sy aap ek leptop ki tara use kr sakty h ismay fromate karny sy aapka jo bhi data save ya contect no h vo bhi aa jayega ager aap fromate karty h aap rurant aapna email daliye our sab kuch aapke samny h its is very good mobile