April 20 (Reuters) - U.S. wireless carrier AT&T Inc (T.N) missed market estimates for first-quarter revenue and free cash flow, underscoring the toll from strained consumer wallets and sparking a selloff in the telecoms sector on Thursday.
In the first three months of the year, AT&T added 424,000 postpaid phone subscribers, almost in line with a Factset estimate of 422,800 additions.
The metric is closely watched by Wall Street as postpaid customers pay a recurring monthly bill, making them valuable to the carriers.
"It was not all bad news, and some aspects of AT&T's operations came in above estimates, but it is the free cash flow figure that seems to have caused all the damage, given that it points to likely lower dividend payouts going forward," said Stuart Cole, head macro economist at Equiti Capital.
AT&T's free cash flow came in at $1 billion, compared with the $2.61 billion estimated by 18 analysts polled by Visible Alpha.