How to change mac address of 3G/4G mobile broadband device?

Question

I am trying to use technitium tmac . But it just doesn't work.

Answer 1

Assuming you are trying to do this programatically, so it is programming related as Joachim notes, then I think you are going to have problems doing it with this software. They note in some of their own feedback on comments that it does not support 3G etc:

... TMAC can change MAC address only for Ethernet & WiFi networks.

From: http://blog.technitium.com/2011/05/tmac-issue-with-wireless-network.html

It might be worth explain more what you are trying to do as the IMSI is normally the key identifier on a Mobile network so it would help to explain what you are aiming to do by changing the MAC address.