Open it through Unicom online business hall www. 100 10.com, and the steps are as follows: click on the upper left corner of Unicom online business hall to log in. Enter your mobile phone number and service password on the login page. Click Do Business-Internet Traffic-Open 4G Network. Click to process immediately. Tips: 4G networks need to use USIM cards. If you use a SIM card, users need to change the card body in the local Unicom business hall, and then open the 4G network function. China Unicom's 4G network standards are TD-LTE and FDD-LTE.