I want to change my SIM

Heeello everyone!
I’m going to travel out of my country directly to Edinburgh!
So, I want to buy a “pay as you go” SIM because I like to have Internet data connection at UK
But, I have installed Avast Anti-theft, and I don’t want my phone blocked because of a different SIM
What I have to do?

Thank you! And… sorry for my bad English hehe

http://forum.avast.com/index.php?topic=95246.0

Thank you!
Sorry, I should have used the search engine…
After deactivate Avast! and change the SIM…
Will Avast! ask me automatically if I want to add the new SIM to the white-list?
Thank you again!

It should add it or at least ask you if you want to add it.

Tip for searching:
Use google.
You can specify the website you want to search on.

Example:
keyword1 keyword2 keyword3 site:website.ext

If you use:
replace sim avast site:avast.com

This is the result:
https://www.google.nl/search?client=opera&q=replace+sim+avast+site:avast.com&sourceid=opera&ie=utf-8&oe=utf-8&channel=suggest