Samsung Galaxy A3
Set up your phone for text messaging
A text message is a message that can be sent to other mobile phones. Your phone can send and receive text messages as soon as you've inserted your SIM. If this isn't the case, you can set up your phone for text messaging manually.
1. Find "Text messages"
Press Messages.
Press the menu icon.
Press Settings.
Press Text messages.
2. Save the message centre number
Press Message centre.
Key in +6421600600 and press OK.
3. Return to the home screen
Press the Home key to return to the home screen.