Even though the link is actually the My Swisscom overview with the SSL certificate of Swisscom (Switzerland) AG, which has been verified by SwissSign, I assume that it was somehow spam or a joke.
I see reasons here:
Swisscom would never send such an SMS with the name of a communications manager.
It seems that you speak English - even your Android has English as the system language - therefore Swisscom should also send the SMS to you in English.
It is not an OFFER as written at the end of the message.
In spite of the fact that it still redirects to the official Swisscom site, I would recommend that you contact the hotline and describe the case - should this be an official message from Swisscom, they will tell you so, otherwise you can help swisscom so protect other people.
Viele Wege führen zum Ziel - wenn dir meine Antwort gefällt, drück doch auf den Daumen - wenn sie dein Problem gelöst hat, drück auf das häckchen.