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LANSING, MI. -- Talk about being at the right place at the right time.

Lots of people complain about their cable provider... whether it's the price, channel lineup, or signal quality.

One mother in Michigan probably won't be one of them, after an AT&T U-Verse technician saved her four-month-old daughter's life.

Fay Li has your Facebook Story of the Day.

AT&T technician Andrel Reid has been on the job for six months.

He was sent to Christine Duffy's house to fix her U-verse service thinking it'd be just another typical day.

Reid says, "You go in you meet the customer, you greet the customer, he does the work and that's it. You're there probably an hour at the most."

That day's job didn't go as planned. In the middle of it all Duffy's younger daughter, baby Sarah, was in serious trouble.

Duffy says, "She was coughing, it just started blocking up her system and she just started choking on the congestion.

Around her eyes it was getting all red and she started turning different colors."

When Duffy was ready to dial 911, she sent her four-year-old daughter to get Reid's help.

Duffy's daughter says, "She had red eyes and it was kind of scary I said to the tv guy, I think sissy's choking on the medicine."

Hearing that, Reid jumped into action.

Reid says, "I put the baby in a position that I was taught in training, put the baby in my palm, flipped her over and gave her a light trust to her back and that's when everything came up and the baby actually started laughing and smiling at me."

Turns out Reid is CPR-certified as part of his job training ...

"We're in people's homes all day. Sometimes it's just us and the customer, stuff happens and we're the only ones there."

For Duffy it's a mixed feeling of relief and fear for what could have happened. But she says it's a blessing to have someone there who could help.

This was the first time Reid had to perform CPR on the job.

Though he's never done it before, he said in the face of an emergency ... the training came back to him like second nature.

(CNN contributed to this report.)