Samsung SGH-I747RWAATT - Manual (Page 69)

Call Functions 62
Use Internet calling
Your device can make calls over the Internet using VoIP
(Voice over Internet Protocol) using a SIP account.
1. From the Home screen, tap ➔ ➔ Call settings
➔ Use Internet calling.
2. Tap one of the following options:
• For all calls when mobile network available: your phone will
always use Internet calling when there is an available network.
• Only for Internet calls: the phone will only use Internet calling
when you specify directly.
• Ask for every call: the phone will prompt you every time you
make a call.