... WIFI Information MTk6573 650MHz Dual Core,Android 2.3.6 system,GSM Quad band GSM900/1800/1900/850MHz ... + WCDMA 3G 2100MHz Dual ModeWIFI, GPS+AGPS, JAVA ... all over the world) In mobile phones, dual-band and tri-band refer to functionality that allows a cell phone ... card/phone numbers in the same handset.Quad Band: This phone is unlocked for worldwide use, ...