In a television interview on Monday night, Sprint chairman Masayoshi Son said he wants to buy smaller wireless carrier T-Mobile US and plans to press forward despite likely opposition from regulators. Son told Charlie Rose of PBS that a combination of the nation’s third- and fourth-largest wireless companies would enable Sprint to better compete with industry giants Verizon Communications and AT&T. When asked if a deal is in place, Son said he has yet to come to an agreement with T-Mobile. He also expressed uncertainty over whether a deal will happen. “We have to give it a shot,” Son said. “We would like to make the deal happen, but there are steps and details that we have to work out.” Son, who is also the chief executive of Japan’s SoftBank, led a $21.6 billion buyout of Sprint last year after fending off competing bids from Dish Network (DISH).