Is there a charge for changing a small SIM card into a large SIM card?

Hello, after other people's big cards are cut, you can also insert your own small cards with the remaining card sets.

If you go to the business hall and bring your ID card, there is no charge.

Extended data

SIM card is (subscriber identity module), also known as subscriber identity card and smart card. GSM digital mobile phone can only use this card.

The computer chip stores the customer information of digital mobile phone, encryption key and user phone book, which can be used to identify the identity of GSM network customers and encrypt the voice information when customers talk.