If you are looking for a solid wallpaper pack for your smartphone, i.e., Android or iPhone, check out these released around the Windows Phone 7 release.
Download Solid Wallpaper Pack for Your Phone
Well, here is a pack of Windows Phone 7 wallpapers; it has eight wallpapers designed by TWC Author and forum member Lee Whittington; while they were specifically built for Windows Phone, you can install them on any phone you like.
You can get the download link for this pack here @ The Windows Club
While most smartphones now offer apps from which you can download wallpapers, these are excellent changes you add to your collection.