Hello
The operation is not completely identical, but very similar.
What causes my mum some trouble are the messages and missed calls, which you have to delete with extra effort because otherwise they are constantly displayed.

I have just sent the photo to Digitec with the request to send you the photo mentioned below.

Well, it's a bit difficult to answer the questions exactly because I don't know how the old device was operated.
It's a very simple operation that covers most things.
Contacts, phone calls etc.
I also don't know if the same SIM card fits, but it's not the "old big SIM card", but the newer ones.
Greetings Zoran Knezevic
Otherwise I could send you a photo.

Good evening, I did not buy the appliance for myself. Unfortunately, I can't say anything about the ease of use and user-friendliness of the appliance.
Kind regards P. Zimmermann