OPPO mobile phone (privacy protection) can I see protected short messages when I change my mobile phone?

There are two ways to store short messages:

Ordinary mobile phones, old models, short messages are stored in mobile phone cards (SIM cards), generally not more than a dozen, if you move SIM cards to other mobile phones, you can also see them!

Now most mobile phones, especially

In smart phones, short messages can be stored in the memory of the phone itself and can be encrypted by using the privacy option of the phone. If you don't know the passwords, others can't read them.