Telecom's mobile phone card can't send short messages to electrical signals. What happened?

Hello! I hope the following answers can help you.

Test the mobile phone card with telecom mobile phone. First, confirm whether it is a mobile phone or a card. If there is something wrong with the card, you can change it in the business hall, and you need to bring your ID card. If there is something wrong with the phone, you can try to restore the factory default settings.

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