# Data Dedicated Transmission Mode

When your device has an active data connection to a 3G/EDGE/GPRS network, you can enable the Data Dedicated Transmission Mode (DDTM) and divert all incoming voice calls to your voicemail box.

To enable the Data Dedicated Transmission Mode:

- Tap > Settings > Personal tab > Phone > Services tab.
- Select DDTM Mode on the list of available services, then tap Get Settings.
- Select On to divert all incoming voice calls to your voicemail box every time your device has an active data connection.
- Tap OK.