You can place and receive Internet calls over wireless network.
Adding an Internet calling account
From the Home screen tap Phone To open the onscreen number pad. Tap the Menu Button and tap Settings > Call settings > Internet Call. Enable the Use Internet calling And tap Accounts.
Tap Add account, And input the Username, Password, And Server Accounts. You can also configure optional settings such as Display name, Outbound proxy address, Port number, Transport type, and Send keep-alive.
Editing or removing an Internet calling account
Open an existing Internet calling account and make the edits you want on the SIP account details. Tap Save To save your changes, tap the Menu Button and then tap Discard To discard the changes, or tap the Menu Button and then select Remove account To delete the existing account.
Using Internet calling
You can configure your phone to use Internet calling (when you're connected to Wi-Fi) for all calls, only for Internet calls, or to ask each time you place a call.
Receiving Internet calls
You can configure your phone to receive Internet calls made to an Internet calling account you added to your phone. From the Home screen tap Phone To open the onscreen number pad. Tap the Menu Button and tap Settings > Call settings > Internet Call. Enable the Use Internet calling And tap Accounts. Make sure the Receive incoming calls Box is checked.
Calling a contact's Internet calling address
You must add an Internet calling address to a contact to be able to place an Internet call to them.
To make an Internet call, open People From your Home screen or in the Application menu. Tap on the contact to open their profile, and then tap on their Internet calling address to place the call.
Calling a phone number using Internet calling
If you have configured your phone to place all calls using Internet calling or to ask for each call, you may also call a phone number using Internet call, whenever you are connected to a wireless network.
Dial the number and tap, or select the contact you wish to place a call to, then tap the Internet call account you want to use to make the call.
Important: Calling a phone number using Internet calling requires that your service provider supports it, and may incur additional charges. Please contact your service provider if you have any questions.