Question about Nokia 8210 4G

Hello and unfortunately no, Spotify is not available on it.

Is the mobile also suitable for a prepaid card, as I only use it to make calls?

The Spotify app cannot be installed on the NOKIA 8210 4G. No more apps can be added to the existing ones, there is no WLAN and no WhatsApp. The connection to the internet is made via the pre-installed proxy browser OPERA MINI. The operating system is NOKIA's own S30+ (at Digitec Galaxus, the blue version of the NOKIA 8210 4G says Android incorrectly).
For using Spotify without the app, there is the "Spotify Web Player". I cannot say whether this is compatible with the OPERA MINI browser.
https://freeyourmusic.com/de....
I have owned the phone for 4 months. The functions, their design and operation meet my expectations and I am very satisfied with it.

Unfortunately, I can't answer that. I bought the device for my mother (79 years old) and she does not use Spotify...