Karbonn Smart A51 Plus was officially announced in December 2014, Device released in December 2014Mobile Network Support and BandKarbonn Smart A51 Plus have Dual Card Slots,Karbonn Smart A51 Plus support all GSM Based network providers. Karbonn Smart A51 Plus mobile device support 2G Band Frequency at GSM 900,GSM 1800 and there is no 3G Network Band Support,comes with network handling support with Network settings and work offline with flight Mode. Device