I would have the corporate phone for work and my personal for whatever personal is needed.

If two is inconvenient, so be it. Rmart30's example may be unlikely but it is possible. All it takes is ONE screwup in the company to have everyone's stuff checked out. Plus, even if they say it can be used for personal its primary function is for work and they provided it and they have the final say on it.

Also, unless you absolutely have to answer customer or work calls after work hours then turn that thing off at 5 p.m. or closing time and be done. This belief that we should check in during vacations and be "on" or "available" anytime is a bunch of chit. Some jobs may necessitate it. Not all of them do, though, and society has gotten into this "gotta be plugged in checking in reporting in available all the time!" mentality. It's crazy. Work the hours and be done.