Joke Collection Website - Public benefit messages - Is it free for Unicom to send text messages to 100 10?

Is it free for Unicom to send text messages to 100 10?

It's free, as long as you send the corresponding SMS code or text to 100 10, you can query, for example:

Balance inquiry: edit "102" or "balance" and send it to 100 10 to receive the reply balance.

Inquire about the current month's consumption: edit "10 1" or "phone bill" and send it to 100 10 to receive the real-time phone bill reply of the current month.

Unicom's mobile phone number sends messages to 100 10 or receives messages from100/0 for free.