At least in the EU, the GDPR should make some employers reconsider when asking to use personal devices.
The rules can be quite a bit stricter when using a software for professional purposes, and you shouldn't risk an employee doing whatever they want on their device.
WhatsApp for example would only be legal to use if you have explicit, written consent of all the people you're going to save to your contacts.
At least in the EU, the GDPR should make some employers reconsider when asking to use personal devices.
The rules can be quite a bit stricter when using a software for professional purposes, and you shouldn't risk an employee doing whatever they want on their device.
WhatsApp for example would only be legal to use if you have explicit, written consent of all the people you're going to save to your contacts.