How does Unicom send text messages to check traffic? Is there a charge for texting?

Unicom users can directly check the traffic usage for free by sending a short message to 100 10. If the processed traffic packet is queried through the following channels: 1, 3G users can edit the short message 107 1 or send it to100/0 for query; Users who pay after 2.2G can edit the short message 5 19 and send it to 100 10 for inquiry; 3. 2G prepaid users can log on to the online business hall www.kloc-0/0010.com for enquiry. If the traffic packet has not been processed, log in to the online business hall www. 100 10.com to inquire.