Couldn't open serial comm 5G modem kit with RPi 5

With Minicom, you can establish communication with the modem. Replace this command with the APN of your 5G SIM provider and send it again. ‘super’ is the APN for Sixfab SIM. It does not support 5G.

After setting the APN, if everything is fine with the SIM, you should be able to ping.