Hello Vouvaiphof74
Thank you for contacting us about the error code UTE-510 in the SBB app. We apologise for any inconvenience caused.
To resolve this problem, please carry out the following steps:
Make sure that you have a stable Internet connection. Poor network connections can sometimes lead to payment errors.
Check whether you have installed the latest version of the SBB app on your iPhone. Updating the app to the latest version can often resolve various problems. To update the app, go to the App Store, search for the SBB app and tap the “Update” button if available.
If these steps do not work, please call us on the following number 0848 44 66 88 (CHF 0.08/min)
Have a good day.
Greetings
LevinA