Videocon Challenger V40LD was officially announced in April 2016, Device released in April 2016Mobile Network Support and BandVideocon Challenger V40LD have Dual, (Micro Sim + Mini Sim) Card Slots,Videocon Challenger V40LD support all GSM Based network providers. Videocon Challenger V40LD 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