ok I would like to ask a question before the problem occurs.

I am going to install 6.1, but first I would like to make an image of my phone so I can restore it just as it is now if something goes wrong with 6.1. However, if I have to do this, will I have to find the 6.0 ROM or will I just be able to restore?

Also, could someone recommend a reliable program to do this?

Thanks.