Because private mobile phones, as the name implies, belong to individuals and their own private property, not to the strength of the company's labor property, and do not need to be handed over, but the customer information about the company and the enterprise stored in your private mobile phone needs to be handed over to the enterprise.
Executives often hold several positions and have certain management authority, and some may even directly control the company's licenses or important documents, such as business information, personnel files, customer information, correspondence, important contracts, etc. If the company has subsidiaries or branches, executives may also be involved in related positions. Therefore, it is suggested that the company carefully summarize the responsibilities and division of labor involved in the resignation of senior executives and make a list to facilitate the handover. If senior executives have important information about both subsidiaries and branches, they must remember to hand them in together. In addition, the company's property, especially computers, mobile phones, USB flash drives and other electronic equipment, should also be recovered in time. I suggest that you don't rush to format it after you take it back, so as not to find fraudulent behavior of senior executives after leaving the company and leave evidence for investigation.