Restored IMEI now no network issue

Hi XDA,

I have a Galaxy GT-P1000
My locality is New Zealand

Currently flashed;
2.3.6 stock firmware
Baseband JPZ modem

I recently messed up and didn't save efs while flashing and ended up with 0049. I paid a guy to fix it for me and IMEI is showing up correctly now. Serial # is still 000's.

My issue is;
With a correct brand new sim (and others tried) While signal is showing, I have no network, Under Settings -> About Device -> Status;
Phone Number : Unknown
Network : Unknown
Signal strength : (good)
Mob Network Type : HSDPA
Service State : Out of service
Roaming : Not Roaming
Mobile Network State : Disconnected
IMEI : (correct)
Serial number : 000's

I cannot make any phone calls, even toll free or to network support. 5 days ago this tablet was working on a network before flashing it.

Any help would be greatly appreciated. Thank you