Sprint is reportedly preparing a month-long promotion that will give families who switch to the carrier $400. You will have to migrate three or more lines of service from a competing carrier, to be eligible, and then sign up for an Everything Data Share. Sprint offers up a decent selection of smartphones, but its network is behind in terms of LTE availability. However, for families who aren’t too concerned with exceptional data speeds, the offer — lasting from August 19 to September 15 — will allow interested parties to essentially pick up an array of devices for free (or pay a few months of service in advance). As expected, Sprint is pushing its unlimited data, text and calling as a huge reason to make the move, so if you’re unhappy with the service you have, Sprint might be a good place to call your new home.