interfacing arduino uno to GSM SmartSIM340z problems

i need the full interfacing method from you between arduino uno and GSM smart sim340z , also if you can detail as much as you you can , please provide the testing code for modem with the UNO micro controller .

note : what i have done is that i connected :

pin 0 of arduino serial to the tx of modem
pin 1 of arduin serial to the rx of the modem

i connect the Vcc and GND of the modem to the UNO board with 5v
i provided 9v dc to the modem
the SIM registered on network but when testin the modem with modem tsting code on arduino it dont respond