12.3.2 Adjusting the Volume
You can adjust the volume from the Home screen or any application screen (except during a call or when playing music or videos). Press the Volume keys to adjust volume to the level you desire.
You can also adjust the volume from the settings screen.
1.On the Settings screen, touch Sound > Volume.
2.Drag the slider left to make the volume lower, or right to make it higher.
3.Touch OK to save the adjustment.
12.3.3 Changing the Phone Ringtone
1.On the Settings screen, touch Sound > Phone ringtone.
2.Touch the ringtone you want to use, and then touch OK. The ringtone plays when selected.
12.3.4 Changing the Message Ringtone
1. On the Home screen, touch 
> Messaging.
2. In the message list, touch |
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| > Settings > Select ringtone. |
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3.Touch the ringtone you want to use, and then touch OK. The ringtone plays when selected.
12.4 Setting Phone Services
12.4.1 Customizing Call Settings
Mobile phone service providers offer different services such as call forwarding, call waiting, fixed dialing numbers, and voicemail. You can customize many of these services if they are part of your calling plan.
On the Settings screen, touch Call settings to customize your call functions.
12.4.2 Turning on Data Roaming
1.On the Settings screen, touch Wireless & networks > Mobile networks.
2.Select the Data roaming check box.
Accessing data services while roaming may incur additional charges. Ask your wireless service provider about data roaming fees.
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