1. On the Android phone, press on HOME > MENU button and then tap Settings.
2. Tap on Wireless & networks or Wireless controls.
3. Tap on Mobile networks or Mobile network settings.
4. Tap on Access Point Names.
5. On the APNs screen, press MENU button and then tap New APN.
6. In the Edit access point screen, enter the APN settings by tapping on the APN setting item to edit it.
Set the Name to a random fake name, such as Off.
Set the APN to a random fake value, such as blank.
Other items can be left blank.
7. Press MENU button and then tap Save to save the settings to phone.
8. A new APN will be shown. Press the circle to the right of the new APN to select it as the active APN.
I followed the above steps and done now..hopefully it doesnt suck up my credit anymore..anyway what effect will it have if i disable APN? Can still access wifi and internet?
Why all the trouble? Just go to android market n download one of the apn on-off app. Wth tht u can turn the data on or off by a toggle switch.:-)