Thank you very much Tushar and Korrapati.
I had already tried changing the xml file before but it didn't work.
I just tried changing the port in Cfg Runtime but it didn't work either.
But all good, it occurred to me that I could just change the url to https and use port 8443. It worked!
So now I'm past this point but my real issue turns out to be unrelated to this. Now that it's working I still cannot get the mobile scenario to work.
I will close this post and if anything I will create another discussion if need be.
Cheers.