In recent days, an ad was posted on the front door of Rav Chaim's house with a clear prohibiting to enter with a smartphone
The Vishnitizer Rebbe announces,” This year I will burn non- kosher Smartphones with the chometz. Whoever has such a phone in their house should bring it to me- even if they need it for their parnasah. I promise them double the amount of parnasah.”
The Lelover Rebbe declares war on Smartphone devices and the Internet • in a conference held on the subject yeshiva students were required to fill in a questionnaire and list their technological devices