How to send data from Android with 3G/UMTS to a PC - android

I want to send/receive data (e.g. binary or strings) from my mobile Android device to a PC over a WiFi Router.
Is it the same way I send data over WiFi with a TCP socket connection?
So I send data out of my client (Android device) and listen at my server at the port I defined?
If I already programmed the WiFi TCP socket connection, do I have to add additional program code to send the data with 3G or UMTS if I disable WiFi?
Thanks!
Michael


So it seems that there is no additional code necessary because the sockets are on a higher layer on the OSI-model than Wifi or 3G.

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Is it possible to use UDP over the 3G network? I have tried but failed, I have an application on my PC that reads UDP packets and I'm trying to send UDP packets to that "server" using my 3G connected phone.
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I found the following source. The most important thing for me is:
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