I usually let my students keep their devices, but I had one student… I had asked everyone to write 5 sentences about a made up place. The kid was on his phone, showing things to his classmates while assuring me he was doing his work. Everyone finished but him, with nothing. I let every other student share their answers first to buy him time, then when it was his turn, nothing. I took away his phone and he had it done in less than a minute.