Samsung C3520 was officially announced in October 2011, Device released in October 2011Mobile Network Support and BandSamsung C3520 have Mini-SIM Card Slots,Samsung C3520 support all GSM Based network providers. Samsung C3520 mobile device support 2G Band Frequency at GSM 850,GSM 900,GSM 1800,GSM 1900 and there is no 3G Network Band Support,there is no flight mode support. Device Body Design and Display Samsung C3520 is a Flip device and it have device