How does the seller know that the mobile phone number is empty when delivering the goods?

1. First of all, the seller can use 360 mobile phone security guards to check the ownership of the mobile phone, but can't find the ownership.

2. Secondly, you can use Fetion to send a short message to the target mobile phone, and there will be a prompt when the number is empty.

3. Finally, you can directly dial manually to determine whether the status of the mobile phone number is normal, empty or other.