Hi Marcel, ok, no problem. The way, to start a server on the Handy I already tried, but I didn't had in mind, that this has to be so, but to have a completely new connenction between the devices (or has it to be so?). The complete protocol is attached to the mail. The accosted lines exists (see attachment - would it be better to see the java-sources?). On the pc runs a server, that is listening to a connection. A mobile phone searches for the device and the service, tries to connect an sends a 7byte long string ("String!"). This way works without any problems. Immediately after receiving, the server sends an 6byte long string("Handy!") to the phone, using the same connection. But the phone only receives an empty string. Greetings Johannes -- Supergünstige DSL-Tarife + WLAN-Router für 0,- EUR* Jetzt zu GMX wechseln und sparen http://www.gmx.net/de/go/dsl