60
wireless service provider about data roaming fees.
12.4.3  Switching off the Data Service
1. On the 
Settings
 screen, touch 
Wireless & networks
 > 
Mobile networks
.
2. Clear the 
Data enabled
 check box.
12.5  Setting Text-to-Speech
Use the Text-to-Speech settings to configure the Android text-to-speech synthesizer, 
for applications that can take advantage of this feature.
12.5.1  Installing Voice Data
1. On the 
Settings
 screen, touch 
Voice input & output
 > 
Text-to-speech settings
 
> 
Install voice data
.
2. If your mobile phone does not have speech synthesizer data installed, connect to 
Android Market and let it guide you through the process of downloading and 
installing the data.
3. Follow the instructions to install the voice data.
12.5.2  Adjusting the Speech Rate
1. On the 
Settings
 screen, touch 
Voice input & output
 > 
Text-to-speech settings
 
> 
Speech rate
.
2. Select a speed at which the text is to be spoken.
12.6  Protecting Your Mobile Phone
To keep your data more secure, lock the screen and/or require a screen unlock 
pattern every time your mobile phone is turned on or wakes up from sleep mode.
12.6.1  Turning on Your SIM Card PIN
1. On the 
Settings
 screen, touch 
Location & security
 > 
Set up SIM card lock
.
2. Select the 
Lock SIM card
 check box.
3. Use the keyboard to enter the SIM card PIN, and then touch 
OK
.
4. To change the SIM card PIN at any time, touch 
Change SIM PIN
.