I arrived in the Russian Federation with a phone at the push of a button - they sent me back: the FSB revealed the details of the "screening" at the border.
The Russian FSB officially acknowledged in court proceedings the fact of conducting "screening checks" at the border points. During these procedures, the department's employees check the smartphones of travelers and determine whether they have deleted correspondence in instant messages.
At least nine court decisions are known regarding the ban on the entry of citizens of Tajikistan and Uzbekistan through Moscow airports. At the border inspection, foreigners were sent for a survey to study the contents of the mobile devices (the department emphasizes that the gadgets were handed over "voluntarily"). Based on the results of this examination, the final decision on admission to the Russian Federation was made.
The reason for the classification of the citizens as "followers of radical Islam" and the subsequent denial of entry was the history of views on YouTube with lectures by banned preachers, as well as recorded facts of deleting messages. In one case, a foreigner was stopped at the border because he had a normal button phone with him.