You probably do not have an Internet connection from your mobile network provider. If your smartphone connects to the SBB WLAN but you do not log in, you have no connection. In this case, you can deactivate WLAN or log in to the SBB WLAN. The avec 24/7 app cannot be used without an active internet connection. To be able to add new products to your shopping cart and then pay for them, you must have an Internet connection. In the event of other problems, you can contact “Support” in the avec 24/7 app and describe your case.