Now, I make the connection between Linux PC and Sony Ericsson T610 by typing "rfcomm connect 0 <adress>", and it was success. Then, I wish to make the connection in this way: let T610 be the client and PC be the server. When T610 searched the PC, I wish to connect them by selecting the PC in the mobile. But when I entered the PIN, the mobile always showed "PIN not match". Why is that? And how can I do so that the connection can be created by mobile phone?