When I was in highschool in India, our school had installed jammers everywhere to try and prevent the use of cellphones by the students. This was done in part

When I was in highschool in India, our school had installed jammers everywhere to try and prevent the use of cellphones by the students. This was done in part because a sister school had a student sex video make the rounds and it had gone viral being shared via Bluetooth in schools. Anyway what they hadn't accounted for was that our school was right next to a cellphone tower. Anyway it was a mess. You'd walk down a hallway and randomly go between full and zero bars.