gomez’s blog

I was surprised when I tried to place a VoIP call over UMTS/3G network using my Nokia E72. It wasn’t working. In prior to that, I needed to install Nokia SIP VoIP settings application to get VoIP support on my mobile phone (Nokia E71 comes with this software preinstalled, so if you are Nokia E71 user and possible switcher to Nokia E72 be aware of this). I was really positively surprised when I saw how many different options can you configure using Nokia SIP VoIP settings application (for example, you can change your QoS DSCP value for RTP traffic, RTP port range, codecs and so on… impressive.) However, my VoIP calls placed over 3G were unsuccessful. So, I needed to find solution for it.

As a prerequisite make sure that you are connected to UMTS network by navigating to:

Home > Control Panel > Settings > Phone > Network > Network Mode

While there for “Network Mode” field you will need to set “UMTS” and once you apply that you will be connected to your UMTS/3G network (in upper left corner you will be able to see small 3G connection mark).

Once done with that we need to enable 3G VoIP calls.

Procedure is as follows: Navigate to Home > Control Panel > Net Sett:

Once there, navigate to “Advanced VoIP settings” and then select “VoIP services“:

After that you will need to select your SIP profile (which is in our case called devlogic) and after that select “Profile settings” as per screenshot:

Once there, you will need to scroll down and find option “AWCDMA“. That option is set to “off” by default, and you will need to set it to “on” in order to place VoIP calls over 3G network.
W-CDMA (Wideband Code Division Multiple Access), UMTS-FDD, UTRA-FDD, or IMT-2000 CDMA Direct Spread is an air interface standard found in 3G mobile telecommunications networks. Once done, you are ready to make your UMTS/3G VoIP calls.

SIP VoIP settings
Installing SIP VoIP settings
AWCDMA