Ratoawe95
Hello and welcome to the SBB Community.
Thank you for your request.
In your case, I would recommend that you try to delete all browser data and cookies and check your internet connection.
What I would suggest is that you try the purchase on the computer and on the mobile phone that both options are considered.
It must also be mentioned that the website takes a moment to load everything correctly in order to make a purchase.
Then fill in all the details correctly and check them. Don’t give up!
If it still doesn’t work, I would offer you to call us on 0848 44 66 88 (CHF 0.08/min.) and for abroad calls +41 51 225 78 56.
Have a nice day.
Regards SamuelW