... .Frequency:dual band900/1800MHz 3.Interface:DB 9 pin mc39i modem ,SMS/MMS/GPRS function ,advanced performance Specification : Cinterion GSM/GPRS ... and PDU mode, Point to point (MO/MT), Cell broadcast DATA: non transparent, CSD up to 14.4kbps, USSD, Interfaces: UART ... /FEDEX Payment TT/Paypal/Westunion pictures:OEM serive :The mc39i modem is made from cinterion original modules,Interface was RS232 DB9in ...