If you are having problems with your BlackBerry touchscreen, you may want to consider calibrating yours to better suit your preferences. The phone allows you to customise three different settings. For instance, you can change double-tap settings and how long you need to touch the screen to select an item, and how fast the screen scrolls as you swipe along the page. Use the phone's built-in calibration tools to customise the touchscreen options.
Tap the "Options" folder on the phone's home menu.
Change the "Tap Interval" number. This modifies how much time can pass between a single tap and double tap. For instance, if you set the number to 500 milliseconds, you must make your second tap 500 milliseconds after the first tap in order for the touchscreen to register a double tap rather than a single tap. Increase the number to increase the interval.
Change the "Hover Period" number. This item, measured in milliseconds, determines how long you must hold your finger on the touchscreen in order for you to view an item's menu or other function. For instance, if you have "Hover Period" set to 500 milliseconds, then you must hold your finger down on an application for that period of time before a menu appears.
Change the "Swipe Sensitivity" number. This number, ranging from 0 to 6, determines the speed you can scroll through Web pages or other items when you swipe your finger across the screen.
The phone's touch screen learns more about the way you type the longer you use it. If you want to reset the touchscreen, remove the battery for 10 seconds, then reinsert it. this performs a hard reset.