Celkon Campus A20 was officially announced in August 2013, Device released in August 2013Mobile Network Support and BandCelkon Campus A20 have Dual Card Slots,Celkon Campus A20 support all GSM Based network providers. Celkon Campus A20 mobile device support 2G Band Frequency at GSM 900,GSM 1800 and Hight Speed 3G Network Band at HSDPA 2100,comes with network handling support with Network settings and work offline with flight Mode. Device Body Design