Hello :) Yes, that is no problem. As usual, when saving a new contact, simply select whether you want to save the contact on the mobile phone memory or the SIM card. If you save the contact data on the SIM card, this data will remain available if you ever have a new mobile phone.

https://de.wikipedia.org/wiki/Global_System_for_Mobile_Communications#Situation_in_der_Schweiz According to Wikipedia, that would be the case, but not until 2021 - would have it on the air for one more year. After that, you can only play snake. According to a newspaper report, many lifts still have the GSM radio standard to transmit the alarm. Many manufacturers have not yet upgraded their lifts to the latest standard and will hardly be able to achieve it by 2021 - possibly another reason for delaying the longer use.