Wirelessly posted (Nokia 6600: Nokia6600/1.0 (4.09.1) SymbianOS/7.0s Series60/2.0 Profile/MIDP-2.0 Configuration/CLDC-1.0)

Hello, i have sum questions about the 6600, does anyone know a decent wap browser bcoz the built in one always says unknown file format etc. On sum sites, also does any1 know any good wapsites bcoz i have free wap.. cheerz

Sounds like you're trying to download unsupported file-types (pdf, mpeg etc.)
If so, have a look for software to expand the phones range of supported files.