# Data Dedicated Transmission Mode

When your device has an active data connection, 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.