Once upon a time, Sprint offered a pretty amazing deal: One year of unlimited phone service for free.

All you had to do was bring a compatible phone and port your number from another carrier.

Of course, all good things must come to an end: Back in April, Sprint replaced the free-year offer with Unlimited Kickstart, which costs $25 per month -- a reasonable rate, to be sure, but that's only for newcomers activating a new line of service.

Read more: The best phones of 2019

So, what happens when you get to the end of your 12 free months?

Thankfully, no: There are cheaper options, many of them cheaper than what you'd pay any of the Big Four carriers for a single line of service.

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