Samsung s4 mobile phone just got the card, and now the mobile phone is being used by friends. Can I still see text messages on my mobile phone?

You can see the original undeleted messages.

After the mobile phone is changed to someone else's card number, if the mobile phone has not been processed, what you can see on the mobile phone is the short message sent and received when using the original card number.

Not only the short message, but also the original number and all the original information, because these are always kept in the mobile phone.

Therefore, when changing the card to someone else's mobile phone, you must delete these personal information, as follows:

1. Delete SMS separately. In the settings in the upper right corner of the SMS page, you can select all and then delete all messages.

2. Delete all phone numbers in a single project. Answering and Calling Pages (Records)-More-Delete.

3. If you want to completely delete all personal information, you can restore it to the factory status with one click.