How to keep the original text message after changing the mobile phone?

First, under normal circumstances, mobile phone information is stored in the mobile phone memory by default, so if you change your mobile phone, the information will not be taken away with the SIM card.

Second, you can set the information to be saved in the calling card, so that no matter how you change it, the information will be there.

Thirdly, the memory of SIM card is limited, so it won't store much information.