What is the specific upgrade of SMS in the era of 4G network?

Eligible 4G package users can apply to join the SMS age upgrade plan for free. The SMS network age plan is to give a corresponding number of domestic peer-to-peer SMS messages every month according to your online time. 1 month 50 pieces per month, 2 months 100 pieces, and so on. After sending 300 pieces in 6 months, send 300 pieces every month thereafter. For details, please contact Unicom's manual customer service for consultation. The actual situation is subject to local policies.