samsung SGH-D880 DuoS Dual SIM card Noble Black GSM Unlocked Tri-band phone Dual Standby phone GPRS/EDGE Tri-band (900/1800/1900MHz) Dual Stand-by Call with 2 Cores 3Mega CMOS AF Camera 2.3" QVGA TFT LCD Stereo FM Radio microSD Dual SIM Stand-by mode Take advantage of using two phone numbers without changing SIM cards manually or carrying two phones. Your phone supports the Dual SIM cards mode, enabling you to use two SIM cards at the same time without changing them. Activate SIM cards and select the primary SIM card. - mobile simultaneously holds 2 SIM cards - Dual Standby allows the mobile to access either SIM card with one phone mobile automatically switches between SIM cards according to your needs and network access - Allows you to travel freely and never lose access to your phone signal, roaming charge-free