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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.
Press the message icon.
Press the menu icon.
Save the message centre number
Press SMS service centre.
Press the field below "SMS service centre".
Key in +35387699989 and press OK.
Return to the home screen
Press the Home key to return to the home screen.