The VoIP connection over 3G needs to be enabled in Menu > Settings > Connectivity > Internet Telephone > Connection type by choosing WLAN or 3G. Also the VoIP settings need to have 3G support enabled which can be checked from Menu > Settings > Connectivity > Internet Telephone > Accounts > (your account) > Options > Details.
- I cannot hear the other person in a call
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- Where can I find information about WhatsApp, Skype, Angry Birds, Twitter, NimBuzz, Viber, Fring, or some other non-Microsoft application (3rd party application)?
- My phone feels warm
- My Bluetooth connection does not work