Deutsche Telekom, parent company to T-Mobile, has lifted its forecast for full-year 2017 after strong results in the second quarter, led by its operations in the U.S.

Adjusted EBITDA was up 8.9 percent to EUR 5.99 billion in Q2. For 2017, the German operator now expects EBITDA of EUR 22.3 billion, up by EUR 100 million from its previous forecast, following a similar upgrade in the forecast of T-Mobile US.

Net revenue increased six percent in the second quarter to EUR 18.89 billion. Sales rose 12.7 percent in the U.S. to EUR 9.24 billion on continued strong customer growth, and revenues were up 0.6 percent in Germany to EUR 5.37 billion. Telekom’s net profit was up 40.7 percent to EUR 874 million and increased 13.8 percent on an adjusted basis. The forecast for annual free cash flow remains at EUR 5.5 billion, after an 18.1 percent increase in the first half of the year to EUR 2.53 billion.

Deutsche Telekom attributed the growth to record investments driving customer and sales growth. The group invested EUR 2.99 billion in the second quarter, up 12.4 percent from a year earlier. Including payments for mobile spectrum, the figure rises to EUR 10.24 billion, of which 7.2 billion spent by T-Mobile US to acquire spectrum.