mlm122
You can try with another MAIN firmware as well, but if all the padlocks are open, then the patch works. Also I think the problem is that the other network operator(s) are blocking the phone's IMEI...Keiji, I have tried the simlock patch gen several times on my my 580i, and it shows all the padlocks unlocked, but stiill won't recognize another operator's sim. What Main file did you use, please?
By the way what error message you get? The 'original' SIM card still works? If you have more SIM cards form different networks try all of them.