How to open SMS monthly service?

You can open the monthly SMS service in the following ways (prepaid users only, post-paid users can open it manually): 1. Send BLDX3 to 100 10 to open the monthly SMS service in 3 yuan; 2. Send BLDX5 to 100 10 to open 5 yuan SMS monthly subscription; 3. Send BLDX 10 to 100 10 to open a short message 10 yuan for monthly subscription; 4. Send BLDX20 to 100 10 to open 20 yuan SMS monthly subscription. 5. You can also call 100 10 customer service or visit our own business hall. Tips: The opening, change and cancellation of the package will take effect on June 1 day of the following month. (The above content is only applicable to Guangdong Unicom users)