Should a banking app work without sim card used for activation.

[NikhilG]

So, I have an experience with many banking apps and for almost every one of them it doesn't work if we remove the sim used for activation of app.
So here is what happened with me, my IDFC app stopped working on my old android phone so I temporarily moved my Sim to my new galaxy s24 installed and activated app. After few hours I removed my Sim from the phone and put it back to my old phone but the idfc app still works on my s24 which is without sim now.
I don't think other banking apps behave like this?

 

[hender]

So, I have an experience with many banking apps and for almost every one of them it doesn't work if we remove the sim used for activation of app.
So here is what happened with me, my IDFC app stopped working on my old android phone so I temporarily moved my Sim to my new galaxy s24 installed and activated app. After few hours I removed my Sim from the phone and put it back to my old phone but the idfc app still works on my s24 which is without sim now.
I don't think other banking apps behave like this?

How do you see this, as a advantage or threat !!