Network doesn't work despite SIM is correctly detected

Of course there is credit even now on my SIM, I am using it. You wouldn't mean that I have to pay a separate fee just to connect to Apple services? That would explain why even through Wi-Fi I can't authenticate my Apple ID as I had explained in one of my posts, Impossible to download games. I still have to find a solution to that, the authentication loading just never ends.

Well, if you mean a configuration on the iPad settings then no, I did nothing specific as usually once inserted the SIM works immediately, needs specific configurations or I receive a configuration SMS. When I started the iPad the first time with the SIM connection was enabled automatically (I don't like such things) and I see my SIM provider name (Very) on the right of signal dots on notifications panel so I never thought of changing anything. Should I disable Automatic option and try with a different provider? Perhaps I never needed to do this thing since the default Very works fine.

I tried all the providers I had on my list but only another one was detected, others just disconnect. Anyway, I noticed that the iPad detects the SIM as it feels like it, after some seconds it stopped detecting it so I tried enabling and disabling Flight Mode and I could force it to detect it. Data Usage values are always at 0 nonetheless so doesn't really send or receive.

I don't mind of calls or messages at all, I never use them 😁. But I never thought that SIM wasn't good for tablets, this is new for me, I used a SIM on a tablet Alcatel PIXI 4 and had no problems with it 🤷.

Thanks for telling me to check again there, in fact I realized that I just had to add my APN there. I didn't it before because as APN option is under Roaming (that I see as Roaming: No) I thought that it was related to the roaming use but then understood that the space between Roaming and APN options is to separate them, not that APN is really related to Roaming, I'm so dumb 😒🤦😂. So far on my phones I never needed to add the APN manually since the connection worked out of the box or I received a configuration SMS to apply in a tap. Anyway, now it works just fine, thanks 👍.