Samsung Rex 90 was officially announced in February 2013, Device released in March 2013Mobile Network Support and BandSamsung Rex 90 have Dual, (Mini-SIM) Card Slots,Samsung Rex 90 support all GSM Based network providers. Samsung Rex 90 mobile device support 2G Band Frequency at GSM 850,GSM 900,GSM 1800,GSM 1900 and there is no 3G Network Band Support,comes with network handling support with Network settings and work offline with flight Mode. Device