US telecom service firms Sprint and T-Mobile were nearing a deal valued about $32 billion and likely to be scrutinized by anti-trust regulators, US media reported Wednesday.

The Wall Street Journal and others indicated that under the terms of the deal, which could still fall apart, Sprint would acquire rival T-Mobile for $40 a share.

The merger would unite the third and fourth largest US providers to compete with market leaders Verizon and AT&T.

Sprint and T-Mobile were also reported to be considering teaming up to take part in an auction next year of airwaves being freed from use by television broadcasters.