Right thanks mate, the 3G was already jb. Got Cydia running fine. Tried ultrasn0w 1.2.4 loads of times tries reboots airplane mode etc. but I still can't get it working.
What I understand is that 06.15.00 is the current iPad baseband. The odd thing is the 3G data connection is working ok.
Ive not tried that yet, I tried using a method off youtube. Using a custom firmware and redsn0w. Everything worked ok, but once I had completed Iam still not getting a signal and ive tried various SIM cards.