T-Mobile sees huge boom in phone subscribers, but here's why the stock is falling

Core Insights - T-Mobile US reported 962,000 net additions of postpaid phone subscribers, which is the company's best performance for a fourth quarter, although it fell short of Wall Street's expectations [1] Company Performance - The net additions of 962,000 postpaid phone subscribers indicate strong demand, but the figure did not meet analysts' forecasts [1]