Walmart launched their new Family Mobile cell service yesterday. With Walmart Family Mobile, dads and moms can get unlimited talk and text for $45 a month (additional mobile lines are only $25 per month). The Walmart branded cell phone plans are actually powered by T-Mobile, but the plans won’t be available directly from T-Mobile. The new Walmart plan is a postpaid/prepaid hybrid. You pay at the end of the month for talk and text, but you have to prepaid for web data. According to Walmart, their new cell plans do not require contracts and a family of three can save up to $1,200 per year compared to other plans. Sounds too good to be true? Yes and no. Read on to find out why.