Xiaomi 3 uses Unicom card to show that sim card is not activated.

If it is a new prepaid card, you need to take your ID card to register in the business hall. After the real-name registration is successful, you can activate the new number when making calls, sending short messages, surfing the Internet and other services.

Post-paid users can use this number after opening an account successfully. If it doesn't work, it is recommended to take the card to the business hall for feedback.