Remove or Insert the SIM Card for the Cingular 3125 SUBJECT: Remove or Insert the SIM Card for the Cingular 3125 Remove or Insert the Smartchip for the Cingular 3125 FACT: Windows Mobile 5.0 Cingular 3125 FIX: If you are viewing information on devices or services, please note: content reflects instructions for devices and services purchased from AT&T. Some differences may exist for devices not purchased from AT&T.