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AT^U2DIAG=1 Modem and CD-Rom Mode AT^U2DIAG=255 Modem+CD-Rom+Card-Reader Modem+ Factory Defaults Setting AT^U2DIAG=256 Modem+Card-Reader Mode AT^U2DIAG=257 Disable Application Port AT^U2DIAG=276 Reset to factory Defaults AT^CVOICE=? Gives Status of your modems voice.. AT^CVOICE=0 Enable Voice AT^CVOICE=1 Disable Voice ATI Gives Manufacture Information of Modem AT+CGMR Gives firmware version of Modem AT+CGSN Gives IMEI of Modem AT+CIMI Gives IMSI of Modem