Invalid sim after downgrade from 1.1.3 jailbreak
I have a UK iphone that i've been using with on o2 sim card since christmas. I update the firmware to 1.1.3 jailbreaker yesterday and it worked fine. For some reason i couldnt delete some software off my iphone so i decided to do a 'restore' in itunes. Obviously with my impatience, i didnt realise it would take it back to the defualt 1.1.2 firmware that was origionally installed when i got the iphone. I tried to jailbreak and activate it again using this method - http://www.hackint0sh.org/forum/showthread.php?t=15849 but im getting invalid sim error when i start it up. I'm not really sure about what baseband it is, i dont know how i find that out. The serial number says its week 42. Can anyone tell me how i can fix it? Is it the case of waiting for the next firmware update or can i sort it out now??
Thanks v. much in advance