My data and text works, but my calls won't?

Samsung Galaxy s10e

I recently got this phone. I had a problem getting the sim to show up in the first place, and then later after reinserting it, it showed up. After I got my phone started and set up, i tried to make a call. It doesn't work. I hit the call button and not even a second of the screen popping up showing that it is calling, it ends the call. I called different numbers and it does the same thing. I went through multiple processes that it said online to do to fix this, and none of it helped. I think it is something internal, like the sim reader, or it is the sim card itself.

I also tried putting the sim card in my old phone and it the call rang, but the person i tried calling said they didn't receive a call.

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Update:

I tried a new sim card to see if my card was bad. It doesn't do it as well. It is the reader itself.