The Gülenist Terror Group (FETÖ) is known for its utmost secrecy and members, even when it was disguised a religious movement, long before its coup attempts, it managed to keep its secret members away from the public eye. Pay phones were one of the methods used to disguise contacts between its members. A new intelligence report shows that the terrorist group turned to pay phones to arrange meetings of its infiltrators in various places and their handlers, as early as 2009. Another critical finding of the report is that the first tip-off on use of this communication method was given to police in 2015, at a time while FETÖ still had high infiltration in law enforcement, eventually FETÖ-linked police officers covered up the case related to the tip-off.
FETÖ posed as a "hizmet" or service movement for years under the leadership of Fetullah Gülen before it disclosed its true intention – to topple the government and create chaos in the country in 2013 with two plots targeting people close to the government. Turkey managed to stave off these attempts and launched operations against the group which was designated as a national security threat. In 2016, the terrorist group tried to seize power again, this time by staging a coup attempt with the aid of its infiltrators in the Turkish Armed Forces. This attempt was quelled too and the group faced heightened scrutiny. Police launched countless operations against the group since the 2016 coup attempt that killed 251 people and injured nearly 2,200 others. Hundreds of military infiltrators were discovered and arrested with investigations into pay phone use.