I have a Samsung Galaxy SIII Mini which I bought in Germany. I have a pre paid account which when in use in Medicine Hat works fine, however when I try to register with Telus in Ralston (as there is no coverage for KOODO in Ralston) it appears on my network settings but fails to register? It's very annoying and frustrating as the KOODO Sales Person assured me (twice) that it will work on Telus in Ralston. Please help!!!