Thank you for you request.
You can buy a connection ticket via the SBB Mobile App.
The best place to get an explanation and information is at zpass.ch. If you have any questions, we are here for you.
Please call us under the following number if you have difficult to understand, then we will be happy to explain it to you:
Tel. 0848 44 66 88
(available 24/7, sometimes you may be required to wait)
I wish you a nice day
Kind Regards MelanieD