Invalid sim card message post upgrade

[manish]

Hi,
I bought this phone :ios4: in US and now I am in India. I was using Gevey sim to the phone here. I connected to iTunes and upgraded by mistake. It started showing Invalid Sim.
I tried restore and the situation got more worst.

Please suggest what to do.
I am trying not to jailbreak and I think the phone got upgraded to 4.3.5

Please advise.

 

[iJeff]

You are going to have to downgrade to the old firmware to jb your phone. Did you save your shsh bloobs?