To manage an active call when the touchscreen is disabled, use the hardware buttons on your Centro (on left side of the Centro).
- OR -
The keyguard feature might be accidentally enabled. To turn off Keyguard, do the following:
• When the screen is off, press the red power button to wake up the screen.
• Press the center (Palm) button to turn off Keyguard.
You can change how quickly Keyguard turns on, or you can disable this feature altogether. To change the Keyguard settings, do the following:
• Press the Home button
• Select System from the category drop-list at the top of the screen
• Select Prefs
• Select Keyguard.
• Select the Auto-Keyguard pick list, and then do one of the following:
-Select how quickly you want Keyguard to turn on: When power is turned off, 5 seconds after power off, or 30 seconds after power off.
-Select Disable to completely disable the Keyguard feature until you turn it on again by pressing Option + Power/End when the screen is on.
4 Select Done.
More information about the keyguard feature canbe found in the Palm Centro User's Guide:http://www.palm.com/us/support/handbooks/centro/centrosprint_ug.pdf
Have a great day,