To clear all cache for an application
1From the Home screen, drag 
upwards.
2Find and tap Settings.
3Tap Applications > Manage applications.
4Tap the desired application.
5Tap Clear cache.
It is not possible to clear the cache for some applications.
To delete an installed application
1From the Home screen, drag 
upward.
2Find and tap Settings.
3Tap Applications > Manage applications.
4Tap the desired application.
5Tap Uninstall.
It is not possible to delete some preinstalled applications.
Permissions
Some applications need to access parts of your phone to be able to work properly. For example, a navigation application needs permissions to send and receive data traffic, and access your location. Some applications might misuse their permissions by stealing or deleting data, or reporting your location. Make sure you only install and give permissions to applications you trust.
To view permissions of an application
1From the Home screen, drag 
upward.
2Find and tap Settings.
3Tap Applications > Manage applications.
4Tap the desired application.
5Scroll down to view Permissions.
Installing applications from unknown sources
Installing applications of unknown or unreliable origin can damage your phone. By default, your phone is set to block such installations. However, you can change this setting and allow installations from unknown sources.
To allow the installation of applications from unknown sources
1From the Home screen, drag 
upward.
2Find and tap Settings > Applications.
3Mark the Unknown sources checkbox.
Status bar
A status bar at the top of the screen displays phone status information and notifications. Notification icons appear on the left side of the status bar. Phone status icons appear on the right side. From the status bar you can access the notification panel.
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Phone status icons
The following status icons may appear on your screen:
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