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.
- How can I recover/reset/restore my phone software?
- My Asha (Series 40) phone does not work or respond as expected
- I have forgotten the security code for my Nokia (Series 40) phone
- My phone does not charge
- How do I resolve the “conflicting applications” error when starting one of my preinstalled applications?