Problem with Aham on Android

Hello,

I have a problem using Ahamo. I have just received my SIM card, and tried to use it im my Android phone. It’s a Samsung Galaxy S9+ from Europe. Data works fine, but I can’t use SMS or make a phone call.

I’ve checked APN settings, and this is where it gets weird. There are two default APN settings: spmode.ne.jp which is the one I should use, and another one which is ims, I suppose it’s for VoLTE from what I’ve read online.
When I delete the first APN, I can then receive SMS and makes phone call, and I don’t understand why.

Can someone help me on this matter?