The king card 3G can t use the traffic, my king card shows 3G but can t use the network

China Unicom users cannot use the 4G network:

1. Please check whether the mobile phone settings are enabled for 4G network.

3. If other Unicom users can use it normally, carry out a test of changing the phone and changing the card to see if this card is placed on other mobile phones, if the situation is the same as before, you can take the card to the nearest business hall and ask the staff to assist in the test; If this is not the case, it is recommended that you take your mobile phone to the after-sales service.

If the signal in your location is poor or unstable, it is recommended that you test in another place.

If the mobile phone does not support the 4G network standard of China Unicom, it is impossible to use the 4G network, it is recommended that you change the phone to test and pay attention to whether the users who use the China Unicom card can use the mobile phone to access the Internet normally.

Check whether you** monthly traffic has reached the maximum value, if it reaches the peak, the system will automatically turn off the mobile phone Internet function, unable to use the mobile phone to access the Internet, and the next month will automatically resume the opening.

There are two possibilities: 1 is not good for the card, and 2 is that a switch for moving data is not turned on.

If you cannot use the 4G network of China Unicom, we recommend that you use the following conditions to troubleshoot the 4G network:

1] Use China Unicom 4G** or ** have opened 4G network function;

2] The mobile terminal supports China Unicom 4G network;

3] The location has a 4G network covering China Unicom;

4] The number card is a USIM card.

Signal problem: If 3G is displayed, pay attention to whether the current location is connected to the 4G network coverage area of China Unicom. In addition, you can check whether the data mode enabled by the card is 4G in the mobile phone settings.

4G to 3G is not a matter of traffic! This is the result of the cooperation between the network operator and China Railway. - Problems with signal coverage.

You see if the mobile network is set up, or if your card is enabled for 4G

If your mobile phone cannot access the Internet normally, please check the following conditions:

1. After upgrading to 4G**, if you don't restart your phone, you won't be able to use the Internet answer function normally;

2. Confirm whether there is a network, it is recommended that you can use it in a place with a strong signal;

3. Check whether there is still a phone bill in the account, if the balance is insufficient, you need to recharge before you can use it;

4. After 3-5 minutes of power off, restart the phone and try again;

5. Check whether the USIM card is inserted, if it has been inserted but still cannot be used, it is recommended that you go to the business hall to check whether the USIM card is faulty, or replace the card for testing;

6. If the traffic usage reaches the maximum value in the current month, the network will be automatically closed, it is recommended that you pay attention to our SMS reminder or inquire about the **product description.

1. If you mean copying.

It is not excluded that the signal of the DAO is poor or unstable in your location, so it is recommended that you test it in another place.

2. If the mobile phone does not support the 4G network standard of China Unicom, it is impossible to use the 4G network, it is recommended that you change the phone to test and pay attention to whether the users who use the China Unicom card can use the mobile phone to access the Internet normally.

3. If your monthly traffic reaches the cap, the system will automatically turn off the mobile phone Internet function, and you will not be able to use the mobile phone to access the Internet, and the next month will be automatically resumed.

1. There are three possibilities:

Your region does not support 4G coverage, it will be automatically downgraded to 3G.

If your 4G traffic usage is overused in the current month, it will be automatically reduced to a 3G network.

Your mobile terminal does not support China Unicom's 4G network standard, please confirm whether the brand and model of the mobile terminal support it.

2. To use China Unicom's 4G network, the following conditions need to be met:

1. The mobile terminal must be a terminal that supports China Unicom's 4G network standard; The mobile phone tariff must be China Unicom 4G** tariff, or China Unicom 4G network has been opened;

2. China Unicom 4G network can only be used under the coverage of China Unicom's 4G network signal, and if there is no 4G network coverage, it can be backward compatible with China Unicom's 3G and 2G networks;

3. The network signal will be affected by various factors such as topography, landform, high-rise buildings, and climate; When you have a 4G terminal, a "4G" or "LTE" icon will be displayed in the upper left corner of the mobile terminal, indicating that the 4G network in your area has been covered.

4. Turn on 4G in the network settings of the mobile terminal.

Either there's no 4G signal where you're located, or you're running out of traffic and it's automatically downgraded to a 3G network.