Your MBP's white is probably closer to actual white than your phone's.
I would second that, although there technically isn't such a thing as actual white. Actual white is always a bit of preference and a matter of definition. My old 2010 MBP was way too blue in standard. My new rMBP is almost exactly where my 2010 ended up with a new color profile which I used for all the time I had it.
As longs as it is uniform there is nothing wrong with the screen.
You can calibrate the white point to where you need it. I think warmer is always better for the eyes if you work late. Colder usually is preferred by many consumers because it appears a little brighter and more contrasty from afar. That is why most displays are per default way too cold.
If you do photowork calibrate to 6500k. Though sometimes it eludes me what is the point of working with a calibrated screen when most people that view your work, view it on too cold badly calibrated screens. You'd probably want something close to what your customers end up having, too warm is probably not ideal.