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The carrier said it was also pleased by the results.

Aug. 31, 2017 by Ella Pickett

The carrier said it was also pleased by the results.

"While this test is highly successful, we continue to evaluate the technology, understand the challenges and opportunities that are presented and are determined to deploy the technology to consumers," the carrier said in a statement. "We are excited to continue our partnership with our customers, who have proven that these new protocols are not the same as their traditional protocols. And we thank the millions of customers who have used these technologies to call their loved ones."

Today's announcement said AT&T is rolling out a new "SHOP" tool for checking Caller ID numbers for its Voice Service customers. The new tool allows customers to check the number of calls their calling provider calls if they have an active account with the carrier and if they have a current account.

While the company has not announced a rollout of a new phone service for the carrier, it says the new tool will help reduce calls to 5% per month for customers receiving a monthly call subscription.

"We continue to build on our long-standing partnership with our customers, who have made over $1 billion in annual calls in our voice service business to continue their calls on time with the most-used Voice Service in the United States," AT&T said in a statement.

The carriers said they plan to roll out the new tool in the next few weeks, and that more is expected.