T-Mobile US updated its financial guidance following the completion of a $4.4 billion deal to buy UScellular, including a service revenue increase of $400 million for the current quarter.

In addition, the mobile operator stated it expects synergies from the integration to save around $1.2 billion in costs annually, up from an original estimate of $1 billion.

T-Mobile anticipates the integration will be completed in two years compared to its initial assessment of three to four years.

It will take a non-cash charge of about $350 million in Q3 (ending 30 September) as part of its shift to a more streamlined billing technology stack and “personnel costs primarily associated with technology modernisation”.

T-Mobile also anticipates around $100 million in integration costs, excluded from core adjusted EBITDA, and approximately $175 million in depreciation and amortisation expenses.

Despite acquiring a higher-churn UScellular base, T-Mobile expects its stronger core post-paid net additions to offset that, keeping overall post-paid customer guidance unchanged for the year.

T-Mobile completed its acquisition of UScellular’s mobile customers, stores and 30 per cent of its spectrum on 1 August.

CEO Mike Sievert stated on the company’s Q2 earnings call adding UScellular’s spectrum will give it a 50 per cent boost in capacity and a larger presence in rural markets.