BlackBerry 8900 message center number settings should be changed, if you change BlackBerry service provider. since each service provider has its message center number. you should change message centre number for text messaging. as I know the message center number for the entire country for ATT/cingular is +13123149810 (new att and old cingular), for old AT&T (sim starting with 8931) is +19703769301. for example if you buy BlackBerry 8900 Curve from Vodafone, you can set up BlackBerry 8900 Curve message center number as follows: Press the BlackBerry 8900 key > Scroll to Options, press the Trackball > Scroll to SMS, press the Trackball > Scroll to Service Centre, enter +447785016005 > Press the BlackBerry key, scroll to Save, press the Trackball.

Tags: at&t message center number, BlackBerry Curve 8900, cingular message center number