T-Mobile's subscriber boost challenges AT&T for spot as second-largest U.S. carrier

T-Mobile got a boost as more people used its services to stay connected and work remotely during coronavirus lockdowns, sending shares up 5.4% to $114.02 in extended trading.The company said it has overtaken AT&T across postpaid, in which customers pay a recurring monthly bill, and prepaid phones - customers paying for service in advance.T-Mobile reported 98.3 million customers in those categories, while AT&T had nearly 93 million postpaid and prepaid subscribers in its second quarter.