Is It Ethical for Jerry to Keep His Smart Phone

Essay

Is it ethical for Jerry to keep his smart phone on during the work day if:
(a) His daughter is sick and he needs to monitor messages from the baby sitter.
(b) His ID has been stolen and he is waiting for the credit card company to inform him of the damages.
(c) He likes to see what is posted about the company on social media so he can inform his bosses.
(d) He feels as though all employees should have the leeway to be involved in social networking on the job within reasonable limits.
Discuss each of the above using ethical reasoning.