Higher earnings from its slimmed-down US subsidiary helped German phone company Deutsche Telekom post a net profit of €614m in the second quarter of the year.

Earnings were up 76% up over the same period a year ago, when it took one-time charges for restructuring its workforce.

Though earnings at its US division rose thanks to cost cuts and stronger sales revenue.

The company said the numbers of the most profitable kind of customers - those with long-term contracts - fell.

The Bonn-based company said overall revenues were down 0.7% at 14.38 billion and that its European subsidiaries were "holding their ground in a difficult environment."

Deteriorating economies in several countries, added regulation, and exchange rate shifts in the Polish and Hungarian currencies also weighed on earnings.

Deutsche Telekom shares traded down 2.2% at 9.19 in midday trading in Europe.

In the year-ago quarter, the company had to reduce its earnings for the one-time costs of cutting its workforce in Germany through early retirements.

This quarter the T-Mobile USA business saw operating earnings rise 19% on cost control as sales rose 8.7% to 3.8 billion. But customer figures remain a challenge, as the company lost steady, higher-revenue contract customers, partly offset by more prepaid business.

Deutsche Telekom tried to sell T-Mobile USA to AT&T, but the deal was abandoned after US anti-trust authorities opposed it.

Cost cutting in the wake of the blocked deal helped profitability at the US business, which consolidated several of its call centers.

T-Mobile USA now has 4,600 fewer employees than it did a year ago, at 30,500.

The company said that it grew the number of mobile contract customers across Europe by 1 million to 27.6 million, and that smartphones, which can receive email and access the Internet, now account for 60% of devices sold, up from 43% a year ago.

That increases revenue based on how much data customers send and receive. Mobile data revenues rose 21.5%.