What's the difference between Double Network SIM Card?

    What's the difference between Double Network SIM Card?

     
    Item Triple-play network SIM card Double network SIM card
    Signal Coverage Verizon, AT&T, and T-mobile AT&T and T-mobile
    Free Trial Data Plan 100MB 30days 300MB 30days
    Contract NO NO
    Hidden Fee/Activation Fee NO NO
    Data only YES YES
    Scenario Home security/Jungle /Wilderness/Garden Fence/Outdoor RV Travel/Horse ranches/Farming
    Building Construction/Hunting
    Mobile Work/Electrician Learning
    /Wireless working etc
    Home security/Garden Fence/Outdoor RV Travel/Horse ranches/Farming
    Building Construction/Hunting
    Mobile Work/Electrician Learning
    /Wireless working etc