HTC touch viva User Manual

Quick Start Guide  25    

Enabling the SIM card PIN requires you to enter a PIN number 

first before you can use the phone features of the device.

On the Home screen, slide to the Settings tab and then tap 

All Settings. 
On the Personal tab, tap Phone > Security tab and then 

select the Require PIN when phone is used check box. 
Enter the PIN number and then tap OK.

Conserve battery power by adjusting the battery and backlight 

settings. 

On the Home screen, slide to the Settings tab and then tap 

All Settings. 
On the System tab, tap Power. 
On the Backlight tab, set the brightness of the backlight by 

dragging battery power and external power sliders.
On the Advanced tab, set when you want the backlight 

and device screen to turn off when using battery and 

external power. Tap OK.