The latest round followed detention orders for 91 soldiers the previous day.
In the first phase of the new operation, 150 of the 300 soldiers named in the orders were taken into custody.
The operation was ongoing at the time of the report.
Turkish authorities have frequently cited alleged periodic or consecutive calls from payphones or other public phones as evidence in investigations targeting people accused of Gülen movement affiliation.
Ankara blames the coup attempt on the Gülen movement, a transnational civic initiative inspired by Islamic scholar Fethullah Gülen, and designates the movement as a terrorist organization. The movement denies involvement in the coup or any terrorist activity.
