Sir, My Name is Mr.Rajarshi Chatterjee. I had purchased a Smart prepaid sim card no. 9681510861. since 2 years. I am using this sim in Nokia C2600. But yesterday i.e. 22nd April 2012, it shows a message " Sim Registration Failed". But when I install this sim into another mobile, it works & not show any error message. Pls tell me what can i do.


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