They're the sounds of staying connected in the 21st century: ringing, vibrating, constant notifications. And even children are carrying cellphones these days, often into classrooms.
"They have phones. They have smartphones. They could be playing games, they could be doing all kinds of stuff," said Hafedh Azaiez, the principal at Paul Revere Middle School on Houston's west side.
But at Paul Revere, Principal Azaiez said he wants students focused on social studies, not social media. So when the school bell rings, he expects the buzzing of cellphones to stop.
"We don't want them to interrupt their learning or their classmates' learning," said Azaiez.
Depending on the school, children may or may not be able to use a cellphone on campus, but Texas Education Code states that any school in the state can confiscate a student's phone and charge a fee to get it back.
When a teacher confiscated the cellphone belonging to Steve Cline's son, the principal at Lake Olympia Middle School told him it would cost him $15 cash to get it back.
"It's my money, my property and it kind of angered me," Cline told Local 2.