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    4G on the cheap

    The FreedomPop (left) and Karma.
    The FreedomPop (left) and Karma.

    FreedomPop

    PRICE: $89 for Burst, set for release in March; $99 for Photon portable device, available now.

    ª Photon can be ­returned within one year for full refund.

    ª Connects to Clearwire 4G cellular data network.

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    ª Burst users get 1 gigabyte free data every month; Photon ­users get 500 megabytes.

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    ª Additional data costs $10 per gigabyte.

    ª Connects via Wi-Fi to as many as eight computers, smartphones, or tablets.

    ª Users get an extra 50
    megabytes free for each friend they sign up, to a maximum of
    500 megabytes.

    Karma

    PRICE: Mobile hot spot costs $79.

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    ª Connects to Clearwire 4G cellular data network.

    ª Requires Facebook account.

    ª Users get first gigabyte of data for free; additional data costs $14 per gigabyte.

    ª Connects via Wi-Fi to as many as eight computers, smartphones, or tablets.

    ª Users get 100 megabytes of free data for every friend they
    sign up.