About "at+cgdcont"

sample: at+cgdcont:1,“ip”,“internet”
what is the “ip” mean?i don’t my ip number?how can i get the gprs ip?

“GPRS” = General Packet Radio System.

Although IP is (probably) the most widely-known Packet protocol used over GPRS, it is not the only one; eg, X25 is also supported…

The “IP” just tells the modem to use “IP” - as opposed to any other protocol.

Your IP address will be assigned automatically by the system, or will have been advised to you by your provider is you have a fixed-IP service.