Dear All,

I am using iphone 3G (Firmware 3.0.1) from few days when i am opening cydia error appearing GPG Error iMobileCinema - Installation Guide ./ Release: the following signature coundn't be verified because the following public key is not available
NO_PUBKEY
781BC771D3FB0F71


PLEASE PROVIDE A VALUABLE SOLUTION TO RID OF THIS ERROR!

Response would be appreciated.