There are many phone all over the ward.On of them Symphony is a smart phone.It is made by chaina.It’s has many improvements.Symphony has many model. Among them android is very popular.Symphony Hello S20, Symphony Zvi, Symphony H400 is high level phone in this comphany.It’s Ram, Internal memory, Camera, Cpu, Android version, Battery Backup, Display, Otg, USB verson, Net-works Quilety All strong and useful.It’s price is not overcherge.I think it’s very popular all over the ward for it’s own facilitate.