I purchased a new Sony Ericson K85Oi for Christmas from T-mobile. It has a dual sim slot. One came with T-Mobile sim and the other one is empty. I am trying to insert my second SIM card in the new phone. After that when I turned on my phone it showed me Insert correct sim card. I tried my dads sim also but still it is giving me the same kind of error. I am looking for help here. I want to use secondary sim on the same but it is not working.
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