The software is for DCT4 PHONES ONLY, sorry for shouting but 3210,3310,3330,3410,8210,6210 are all dct3 and need to be unlocked via cable connected to your pc, meanwhile back in the land of the living this program will work on all dct4 phones i.e 3510,3650,5100,6100,7210,7250,8310,6310 etc etc etc, so please try to work out wether your phone is dct3 or dct4 before saying that this program doesnt work or the code wont unlock your dct3 handsets, regards to all Billyhl:Clap: