Employees are constantly using their phones in the toilet, how can I stop them?

I am the owner of a company. I found that my employees often use the toilet to leave their seats and hide in the toilet to play mobile phones and surf the Internet. This greatly affects work efficiency. Is there any better way?

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Topsignaljammer  2022.

Nowadays, with the development of electronic products, mobile phones have become an inseparable communication tool for many people every day, but for enterprises, some employees who always play with mobile phones during work are also more and more headaches. It is an employee who uses a mobile phone at work. What should I do? In fact, you can use a cell phone jammer, which can block cell phones and wifi signals, so that employees' cell phones cannot access the Internet, so the problem can be solved.