How to open cornet for Unicom card? Is there a charge?

Hello, the current package is different. Whether the package supports adding cornets and how to deal with them are different. For example, Guangdong Unicom's "friends and relatives network" service, 5 yuan/month/household. If you apply to create or join a VPN group, members in the group can enjoy free calls in the province. Please send a short message "QCJ" to 100 10 to create a friends network, send "QYQ# friends and relatives mobile phone number" to invite friends and relatives to join the group, and send "QDH# friends and relatives mobile phone number" to join the friends group. It is suggested that you can contact local manual customer service for consultation, which is subject to the local Unicom policy.