WASHINGTON, July 23 (Reuters) - Three Democrats on the

House Energy and Commerce Committee raised serious concerns

about T-Mobile's involvement in the Trump

Organization's self-branded mobile service and a $499 smartphone

dubbed Trump Mobile.

Representatives Frank Pallone, the ranking member of the

committee, and Doris Matsui and Yvette Clarke, asked T-Mobile

CEO Mike Sievert to answer questions about the company's

dealings with the Trump Organization.

"We are specifically concerned that T-Mobile's business

relationship with the Trump Organization - while Donald Trump is

serving as President of the United States - presents a conflict

of interest that will harm the American people," they wrote in a

letter Wednesday.

T-Mobile did not immediately comment on Wednesday.

Trump Mobile is powered by Liberty Mobile Wireless, a

Florida-based company founded in 2018 by entrepreneur Matthew

Lopatin. The company is a mobile virtual network operator,

renting bandwidth from major carriers such as T-Mobile to offer

its own service under a different name.

"We are highly skeptical of the recent developments between

T-Mobile and the Trump Organization and are deeply concerned

about the legal and ethical implications of this arrangement,

including on our nation's spectrum policies," the Democrats

said, asking for answers to a series of questions by August 6.

The lawmakers want Sievert to disclose whether he or any

other employee had communications with Donald Trump, anyone

representing the White House, or anyone representing the Trump

Organization about Trump Mobile since January 20. They also want

to know if the company has a deal directly with the Trump

Organization and if so, how much it will receive.

Republican Donald Trump began serving his second term as

president on January 20.

Earlier this month, the Federal Communications Commission

approved two T-Mobile deals that would expand the wireless

carrier's network, after the company ended its diversity, equity

and inclusion programs under pressure from the Trump

administration.