Samsung s5, brush cm12, unable to use the 4g network, how to reply?

If you can't use 4G, you can try to turn it off and on again. If you still can't use it normally, you can check whether the default setting of mobile phone-Mobile Network-Mobile Data Options-Voice and Data View is 3G. If so, you can choose 4G again. Because the specific paths of different mobile phones are different, the actual use method of your mobile phone shall prevail. Please check whether the traffic speed limit or the traffic capping limit has been reached. If you still can't use 4G, you can't rule out that the use conditions are not met. At present, the following conditions need to be met when using Unicom's 4G network:

1) The mobile phone terminal supports Unicom's 4G network

2) The current location is covered by Unicom's 4G network

3) Unicom's USIM card is used

4) The number is enabled for 4G Internet access (you can send a short message "KT4G" to 11 to apply for opening, which will take effect immediately)

If the above conditions are met, it cannot be used.