Sunlight readable displays are rare and while I do know about the Panasonic Toughbook and militarized PDAs there is no cell phone I know of today for your requirements.
If only you were in the shade.
I have been reading reviews of cell phones and the latest smaller pad devices. After sorting out all the useless talk about memory size and relative number of apps I still am in the dark as to whether there is anything out there with enough resolution to follow sports and sufficient screen brightness to see anything in the sun. Has anyone out there found a useful device for daylight viewing?