How to empty the cache
A cache is a memory location that is used to store data temporarily. If you have tried to access or have accessed confidential information requiring passwords, empty the cache after each use. The information or services you have accessed is stored in the cache memory of the phone. To empty the cache, select Menu > Services > Options > Advanced options > Clear cache.
Also see:
How to browse web pages – Nokia 5500 Sport support
How to download content from the internet – Nokia 5500 Sport support
How to change the browser settings – Nokia 5500 Sport support

