(camknows)Right now, T-Mobile’s lowest cost individual smartphone plan is $50/month (plus the cost for your phone) for 1GB of data and unlimited talk/text. For people whose monthly data use is minimal, the company will soon be offering a $10/month price cut for those willing to cap their usage at 500MB. T-Mobile announced today something called “Simple Starter,” which will be $40/month when it becomes available on April 12.