It works wonderfully well as a search engine, when I have to find obscure specialized info. Can always criss check once I have a idea.

Esim is also considered as Sim inserted. During registration apps sent a SMS to mobile number, but with this the device will sent a SMS out to the chat platform. This ensure the number is verified. The message sent will be automated by granting the app SMS privileges. The Sim inserted/loaded will be noted by the app. During app startup it will check if the Sim inserted or loaded as esim is same Sim as before. Then it will work, else a Sim change warning will appear.

Source: UPI payment apps in India already mandates this approach. They want all other apps to do the same.