Want to take some cheap smart phone with GPS to use on bike and in a foot mode, in addition to the usual phone or even instead of him.
Options I see now are two:
1. something, most likely used, based on Windows Mobile,
2. budget on S60 device like a Nokia 5230.
But there are doubts about the suitability of both for this application.
It seems important to batteries enough not two hours, resistance to vibration, and display, to the sun, it was possible though something to disassemble. But water resistance is not important for me, absolutely.