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Reading / Writing to an external mifare cardusing NFC

 
Dushyant Chhetri
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Hi guys,
I tried to write an application to Write contents to an external mifare-4K card,

The application when run on an NFC- Nokia 6131 emulator works fine , However the same when deployed on the same device gives the following error
No Class Def Found Error java/lang/NoClassDefFoundError
java/lang/UnsupportedOperationException

Please help how can i find out what is not supported by the device
 
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