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  1.    #1  
    My Treo 650 won't send text messages, but will receive them. I can only send out as picture mail. Ive manually entered the message center # and have been on the phone with At&t all day trying to troubleshoot this...

    I've done a hard reboot w & w/o the SIM already as well

    Please send me some expert help.
  2.    #2  
    Also, every time I power off or remove SIM, the message center # disappears !
  3. #3  
    Yes, it needs the SIM card to have info.

    For text messages, go to the messaging app > hit the /menu drop down > Options > Preferences > under the Messages tab, heading Create new messages as: > Text only (SMS). Is that your setting?

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