T-Mobile has lately enticed families by giving them a big, 10GB bucket of mobile data at a relatively low $100 rate, but Sprint isn't about to take this competition laying down. Big Yellow has just unveiled a Family Share Pack promotion that lets you split a minimum of 20GB of data (and unlimited voice/text) for a relatively modest $100 per month, plus $15 per line. You're almost certainly getting more than that, too. Sprint throws in another 2GB for every line, so a family of four will have 28GB to play with. If you max out the plan with 10 people, that's a pretty hefty 40GB. You won't get the carrier's signature unlimited data, but this may eliminate worries that Snapchat-happy kids will chew up all your bandwidth.