T-Mobile US CEO Mike Sievert could leave his position before the end of his contract, according to reports from Germany.

German publication Handelsblatt states that Sievert, who took over the role as CEO of T-Mobile in 2020, wants to take a break.

Handelsblatt reports that Sievert has said internally he will step down either this year or next. His current contract runs until 2028.

T-Mobile's chief operating officer, Srini Gopalan, is a potential candidate to replace Sievert.

Gopalan, who has previously headed Deutsche Telekom's Germany business, moved to T-Mobile earlier this year.

Deutsche Telekom is the majority owner of T-Mobile, owning a 51 percent stake in the carrier.

Sievert replaced John Legere as CEO of T-Mobile, taking charge the day T-Mobile closed its merger and acquisition of Sprint.

During his tenure, the company has ramped up its 5G rollout, carved out a satellite connectivity deal with Elon Musk's SpaceX via its Starlink satellites, and has pursued high-profile acquisitions, including UScellular, plus fiber acquisitions including Lumos and Metronet, outlining its fiber ambitions.

He joined T-Mobile in 2012 as chief marketing officer.

In a statement to DCD, T-Mobile noted that Sievert has expressed his happiness in his current role.

"We don’t comment on rumors or speculation, but we will certainly reiterate what Mike has said recently. He loves his job, and believes the most exciting chapter ever in our company’s history is our “Challenger to Champion” plan that we are pursuing over the next several years," said a T-Mobile spokesperson.

"Mike and the board are delighted that we have recruited Srini to join our team as COO and bring his experience to our business. The entire senior leadership team is excited to work together to deliver on the ambitious goals we’ve shared with the public."