Back in my day most of us could t9 text without removing the phone from our pocket, so you just needed a few seconds of the phone up your sleeve to read the res

Back in my day most of us could t9 text without removing the phone from our pocket, so you just needed a few seconds of the phone up your sleeve to read the responses. If anything, the need to physically look at the screen to use it should increase the window for the teacher to detect it?