For me its not about checking with HR (and even trusting them) its about the complete seperation of work/life devices, I don't want my employer having access to

For me its not about checking with HR (and even trusting them) its about the complete seperation of work/life devices, I don't want my employer having access to any of my personal data/metadata and using a work phone as a personal phone does that. As for carrying two phones, I just leave my personal phone in my coat pocket, I don't get a huge volume of calls anyway since people long ago figured out I don't answer them (and I disabled voicemail), if it's urgent text basically.