please help... is my phone bricked?

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http://androidforums.com – Hi I am pannicking a little as my wifes phone may be bricked. i have just got a sim free prada 3 to replace her orange snafrancisco. I flashed using the official ics rom (foolishly i did not check the new phone before hand). on putting the orange sim in, I get no signal, and when i try to select a carrier i get the error your sim will not allow a connection to this network. I phoned orange and they were unable to help. they said i needed to return the phone as faulty. Maybe it is, but i cant help but feel it is most likely software somewhere. i have done a factory reset ad en (General)