I received a text message that my mobile phone card has expired and I want to change my mobile phone card.

What you want to ask is that you received a text message that the mobile phone card has expired. What should you do if you want to change the mobile phone card? Call or go to the sales office to verify.

First call to verify whether it is authentic. If it really needs to be replaced, bring the relevant procedures to the business hall for replacement.

SIM card is a smart card held by mobile users of the GSM system. It can be used on different mobile phones. It is also called a user identification card.