I have the Nokia 5800 Xpressmusic, Its a touch screen type, has a proper GPS, Satnav, Internet access, decent camera with flash, very nice screen size. The battery I got with it was crap, but the spare I bought is excellent.
I have an 8gb SD card in it, which has loads of music on it plus a few short videos, I plan on adding some more, knot tying, fishing and cooking tips, stuff like that.
I took some precautions when I got it, silicon case, and a peelable screen, for everyday use. I bought a good quality clear plastic dry bag a few years back, and it works thru it, so stays waterproof, the only problem is the wand, it can be a bit of a pain to use thru the dry bag.
On the solar recharger point, I have a freeloader, the original, not the one with the extra solar panel, and it worked fine recharging my old phone, it was a Nokia but can't remember the type off hand. I think if I was buying a solar unit now, it would either be a Solio or one of the newer 12v units that are out there now.
Stephen