How did the 4G network become a 3G network?

The 4G network became the 3G network, probably because the base station construction in that place was relatively far away at that time. The internet signal is not very good.

If the number itself is not limited in speed, in general, there are three reasons for this situation: 1: local signal coverage problems

2: Problems with the phone.

3: The problem of the mobile phone card, such as other users around are normal, only the current number appears in this situation, it is recommended to change the mobile phone card to test it, if it still does not work, it is recommended to go to the business hall to test the mobile phone card, if the surrounding users are like this, it means that there is a problem with the local signal coverage, you can contact the operator's customer service to feedback this situation.

If you want to use the 4G function of China Unicom card, you need to pay attention to the following:

1. China Unicom's 4G standards are TDD-LTE and FDD-LTE, as long as the mobile phone supports any of the above DAO systems, you can use the China Unicom card 4G network;

2. If the mobile phone supports it, enter the mobile phone settings - mobile network - network mode and select priority 4G, and select the card slot where the Unicom card is located, and the following conditions must be met at the same time to use the LTE (4G) network function. Network: The 4G network is enabled and the LTE function is enabled for 4G customers on the network side. Must have a USIM card terminal; The TDD and FDD functions have been enabled on the 4G terminal; The mobile phone type and version need to contact the mobile phone manufacturer for detailed consultation.

3. China Unicom's 4G network is backward compatible, if there is no 4G network or the 4G network is weak, it will automatically switch to the 3G network.

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

1. After upgrading to 4G 5G**, if you don't restart the phone, you will not be able to use the Internet 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.

If you have any questions, click here. Consultation.

Maybe the signal is not good, check the network signal, or turn it off again.