•Press and hold the Power/End button 
to turn off your phone. Then press and hold the same button to turn it back on again.
•Perform a soft reset (see “Performing a soft reset” on page 168).
•Confirm that
1.Go to Applications 
and select Prefs 
.
2.Select Network.
3.If the Service field says Untitled, select the Service pick list and select the appropriate Cingular Wireless data service .
4.Select Done.
I can’t send or receive text or multimedia messages
•Make sure the SIM card is inserted correctly (see “Inserting the SIM card” on page 14) and your phone is turned on (see “Turning Treo on and off” on page 15).
•Contact Cingular Wireless to verify that your plan includes messaging services, that these services have been correctly activated, and that they are available at your location (Cingular Wireless should be able to tell you if messaging services have been experiencing transmission delays).
•If possible, contact the recipient or sender of the message, and make sure the receiving device can handle the type of file that is being sent.
•If an text message arrives but does not display an alert, perform a soft reset (see “Performing a soft reset” on page 168).
174 :: Network connection