4G serial modem - unable to connect to network

Sending AT query..
AT

OK
Successfull response for AT query..

Enabling echo and verbose mode
ATE1V1

OK
AT+CGMM

BG96

OK
Model Number : BG96
AT+CGMI

Quectel

OK
Manufacturer : Quectel
AT+CGMR

BG96MAR02A09M1G_O

OK
Revision : BG96MAR02A09M1G_O

AT+CGSN

*************** (Hidden for privacy)

OK
The IMEI(International Mobile Equipment IdentityI is *************** (Hidden for privacy)
AT+CIMI

50502********** (Hidden for privacy)

OK
Phone Number : 50502********** (Hidden for privacy)
AT+CCLK?

+CCLK: "80/01/06,00:09:15"

OK
Current time is"80/01/06,00:09:15"
AT+CPIN?

+CPIN: READY

OK
SIM is ready
AT+CGDCONT?

+CGDCONT: 1,"IP","telstra.internet","0.0.0.0",0,0,0,0

OK
Following connection profiles are available,

CID-> 1
PDP Type->IP
APN->telstra.internet
PDP Address->0.0.0.0
Data Compression->0
Header Compression->0
AT+CSQ

+CSQ: 31,99

OK
Signal level is -51 dbm. Signal condition is excellent. The signal strength range is -53 dbm (Excellent) to -109 dbm (Marginal).

AT+IPR?

+IPR: 115200

OK
Serial port speed is set to 115200.
AT+COPS?

+COPS: 0

OK

AT+COPS=?

+COPS: (3,"Telstra Mobile","Telstra","xxxxx",8),(3,"xxxxx","xxxxx","xxxxx",0),,(0,1,2,3,4),(0,1,2)

OK
Available Networks:
Network Name->Telstra Mobile
Network ID->5
Network Status->Forbidden

Network Name->5
Network ID->5
Network Status->Forbidden

Networks found

AT+CMGS="+xxx-xxx-xxxx"
test


Checking registration status...

AT+CREG?

+CREG: 0,2

OK
The device is not registered and is currently searching for a new operator to which to register.

AT+CGREG?

+CGREG: 0,4

OK
Registration status is unknown.

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