Apple iPhone 11 Pro Max was officially announced in September 2018 , Device released in September 2018 Apple iPhone 11 Pro Max made under iPhone.Mobile Network Support and BandApple iPhone 11 Pro Max have Dual,Dual Nano-SIM, (Nano Sim + e-Sim) Card Slots, Apple iPhone 11 Pro Max support dual mode based on GSM/CDMA based network providers. Apple iPhone 11 Pro Max mobile device support GSM 2G Band Frequency at GSM 850,GSM 900,GSM 1800,GSM 1900,