... extend TF card to 4G maximally, Document management Ringtone: 72 chord; Ringtone format: mp3, mp4, midi, wav, amr ... Photo: jpg,gifTelephone Directories: 1000 groups ,different ringtone for groups,incoming call with big head sticker or videosMessages &Multimedia ... MMS,Memory extended,Coming call firewall,dual sim dual standby dual bluetooth,incoming call show,incoming call inquiring,calculator,unit ...