Can anyone tell me what is the meaning of getting a 0.0.0.0 IP Address under pdp0 in FieldTest ?

* The EDGE IS activated on the SIM being used. [ i can pop out the sim and put it in another phone, a SE k790i, and connect to internet in that.]
* The APN being used is the same. [the one that i used in k790i]

I don't see why i'm not getting an IP in the first place. Does anyone know what could be the reason ?

P.S.: I did see a thread that loads a proxy address for the IP. But for that, i need to get a valid IP Address in FieldTest, and i'm not getting it.