Experiments on GSM/GPRS/HSDPA modem

Modeswitch and init commands for ZTE MF626
AT+ZOPRT=5 (TODO: is this really required?) ATZ+CPIN= AT+ZCDRUN=8 AT+ZCDRUN=9 (to bring back the ISO file system)

I can't get usb_modeswitch to work; however, eject /dev/sr1 does the trick.

Port Settings
Speed: 115200 Data bits: 8 Parity: None Stop bits: 1 Flow Control: None

Sending SMS
AT OK AT+CMGF=1 OK AT+CMGW="+639191234567" > Hello world! +CMGW: 1

OK AT+CMSS=1 +CMSS: 20

OK

Scanning for Available Networks
AT+COPS=? +COPS: (1,"Smart Communications Inc.","SMART","51503",0),(2,"","","51503",2),(3,"Digital Telecommunications Phils,Inc","PH DIGITEL","51505",0),(3,"","","51502",2),(3,"Globe Telecom,GMCR Inc.","GLOBE","51502",0),

OK

TODO

 * How to monitor signal strength?
 * AT+CSQ
 * How to read/write phonebook entries?
 * AT+CPBS
 * How to read/write/delete SMS messages from SIM card?
 * AT+CMGR, AT+CMGL, AT+CMGD
 * How to determine the SIM card's available storage space?
 * AT+CPMS