To modify tap on the selection you wish to change. For example: tap on
Data connection to disable 3G connection and confirm with
Off
as follow.
When both Voice call and Data connection are enabled following 3G icon will
appear as follow confirming you are under 3G line coverage.
This means you are allowed to make voice call, send/receive SMS,
place/receive video call as well as surf the net (please make sure your SIM
card is allowed to support all those task services)
