ATLANTA, GA. — Driven in part by subscriber growth and a record minimum in churn, Cingular reported its highest net income for a quarter with $540 million in the second quarter.

Cingular reported a $147 million profit for the same quarter in 2005.

Cingular’s subscriber base increased to 57.3 million as churn dropped to 1.7 percent. The company, which is a joint venture between BellSouth and AT&T, added a net of 1.5 million new customers in the quarter.

Total revenues climbed to $9.2 billion, an increase of 2.7 percent from the first quarter.