No refunds. Order before 30 October.
You yourself are responsible for the working of this on your phone. No refunding because your phone is not unlocked or whatsoever other reasons why this might not work on your phone. See the above mentioned MHZ frequencies and check your phone model number and make to see whatever bands your phone supports.
I am not working as a phone guy in a phone shop. This is just a service so you don't need to go to a store yourself. I found out the cheapest and easiest setup (prepaid) currently available in the Netherlands.