We're taking a train from FRA to ZRH, and changing trains as Basel SBB. I found that there is a mobilezone in Basel SBB, and would want to get our prepaid SIM cards there if we can (assuming we have enough transfer time between trains).
I know that we can get prepaid SIM cards at ZRH, but it would be good to have an earlier option to get our phones set up in case we arrive late at ZRH.