i've paid with paypal so probably i can obtain a refund...
this is the same seller that sold me the pda... working well but at the time he forgot to send me the wifi card, then sent a not compatilbe.. in few words everytime a problem... i fell a stupid continuing to buy from the same seller... but this time i hadn't notice that the seller was the same
thank you C:Amie... i've tried to explain him the difference from a type b usb port and J720 serial port.. i hope that he understood