Sprint has announced that customers who sign up for its $100-a-month Better Choice XXL plan will get a year of Amazon Prime for free, which is normally worth $99.

Sprint says that families can share 40GB of high-speed data under the Better Choice XXL plan. If they run out of that amount of data before the month is over, they can choose to stick with the lower 2G speeds or automatically purchase $15 per GB of extra high-speed data.

Sprint previously announced all of its customers had the option to add Amazon Prime service to their bills for $11 a month.

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