How does China Unicom open the GPRS package of 9 yuan 100M?

If you are a user of Guangdong's 2G package, you can send a short message GPRSD9 to 100M0 10 to open the GPRS traffic package 9 yuan 10 for free. In the first half of the month (1- 15), the charging method is full rent and full traffic. In the second half of the month (65438), due to the different charging contents and handling methods of traffic packets in Unicom provinces, it is suggested that you contact the number of 100 10 to find out how to handle traffic packets.