Can I Use Broadband Stick On Another Network Can You Use Another Network In A Mobile Broadband Usb Stick?

Can you use another network in a mobile broadband usb stick? - can i use broadband stick on another network

I have a T-Pay as you go mobile broadband USB and you get 3 GB for 20 € per month.
Then I put another SIM in these networks, and if not, how do I unlock
Thanks