For a limited time, T-Mobile has brought back one of their most popular promotional plans for families who can take advantage of it. It's called the 10 Gigs 4 All plan, and it offers the following: 4 Lines for $120 per month ($30 each), and each of the four lines gets 10GB of 4G LTE data.
Technically, T-Mobile doesn't quote break it down that way. Basically it works like this: T-Mobile offers the first two lines for $50 each per month, the third line for an additional $20 per month, and you can add a fourth line for no additional charge. You can even add 10 additional gigabytes per month for just $10 per line. Regardless, to get this promo you have to sign up for a minimum of 4 lines, so the price will always be the same.
To be clear, all four users also get get unlimited calling and texting (including to and from Mexico and Canada) included in this at no extra charge. You even get the usual extra T-Mobile perks like rollover data and Wi-Fi calling.
T-Mobile had this promotion before back in July, but it was a limited time at that time too. We aren't sure how long this one will last, so you should head over and check it out as soon as possible: Family Plans w/ up to 10GB 4G LTE Data Per Line | Family Plans | T-Mobile