HD OOMA screen too dark in sunlight.

HI,

I was thinking to purchase a second OOMA HD handset. However, the one I currently have provides a very hard to read screen when used outside, in even on a cloudy day. The screen is set to max brightness.
Will a new handset be any better?

Inside use works great! Range (distance) is good inside or outside, voice quality is good. The only problem is display brightness when used outside.