On the screening of mobile phones in the examination room! ! Can you receive short messages, how to receive them,

The one by the window may be lucky to receive it, and the broken shield of the school will look like this. Unless the shield is facing you, the signal is still a little, almost. When you go to the toilet to pee during the exam, you will receive a text message. The toilet signal is good, and the toilet is not shielded. That's how we took the exam.