As a Supervisor in a Child Care Center , write the solution for this scenario below

Technology Issues: "Amie is a probationary employee who has had I disciplinary write-up for cell phone use in the classroom. Overall, her work performance is adequate and she is well likely by staff. When I approach her about using the cell phone, she states she has to keep it in case her children need to get in touch with her. I don't want to discipline her again, but her use of cell phone in the classroom has to change."