Sprint shares gained as much as 5% in extended trading, while T-Mobile rallied 3%.
Nikkei reported earlier this week that talks ended after SoftBank, the Japanese telecom company that owns Sprint, insisted on retaining a controlling stake in the combined firm. Deutsche Telekom, T-Mobile’s owner, showed interest in taking control but was rebuffed, the report said.
SoftBank looked into buying T-Mobile as far back as 2014 but backed down after telecom regulators made it clear they would block any acquisition of the fourth-largest US carrier.
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