There is a 4g module in the data of Sony l39h mobile phone. How can I activate it?

Sony mobile phone 4G network setting method can be tried according to the following steps: 1, confirm that the 4G calling card has been replaced and turn on the 4G function; 2. Try to restart the phone; 3. Drag down from the top of the screen (or up from the bottom) to ensure that Move Data is turned on; 4. Set the network mode to 4G priority or turn on the 4G switch (the setting method is as follows: Go to Settings-More-Mobile Network, select the SIM card that needs to select the network, click the preferred network type, and then select LTE (preferred) /WCDMA/GSM as needed. ); If you don't set the network mode or you can't use 4G after setting it, it is recommended to change the machine and card for testing.