Can an ordinary mobile phone become a 3G mobile phone?

No, you have to change your phone, but the card can continue to be used.

1. Open the "Settings" option, find "Dual SIM and Mobile Network", and click to enter the network settings page.

2. Select a card that needs to be set in the "SIM Card Information" column in the "Dual SIM and Mobile Network Campaign" and click on it.

3. Find "Network Type Selection" in "SIM Card Information", click and select "4G Network First" to recover.

4G is a combination of 3G and Wi-Fi, and can quickly transmit data, high-quality audio, ** and images. 4G is capable of speeds of more than 100Mbps** and can meet the requirements of almost all silent users for wireless services. In addition, 4G can be deployed in places that are not covered by DSL and cable modems before being extended to entire regions.

Obviously, 4G has incomparable advantages

Summary. 1. It may be due to the current signal coverage or the use of the network by many people. This situation is relatively common, you can try to turn on the [Airplane Mode] of the mobile phone and wait until the mobile network is turned off, and then turn off the airplane mode to let the mobile phone search the network again;

2. If you don't want to fall back to the 3G network, take Android phones as an example, you can select the SIM card you need to set in the [Settings] - [Dual SIM and Mobile Network] settings, and then click to enter the [Network Type Options] and select [4G Network Priority];

3. Either check whether there are [security settings] on your phone, or install an app with traffic reminders, and after exceeding the currently set ** traffic, the app and settings will automatically cut off the traffic for you. We can try to turn off the traffic limit or increase the level of the traffic limit.

What to do if the phone has changed from 4G to 3G.

1. It may be due to the current signal coverage or the use of the network by many people. This situation is relatively common, you can try to turn on the [Airplane Mode] of the mobile phone and wait until the mobile network is turned off, and then turn off the airplane mode to let the mobile phone search the network again; 2. If you don't want to fall back to the 3G network, take Android phones as an example, you can select the SIM card you need to set in the [Settings] - [Dual SIM and Mobile Network] settings, and then click to enter the [Network Type Options] and select [4G Network Priority]; 3. Either check whether there are [security settings] on your phone, or install an app with traffic reminders, and after exceeding the currently set ** traffic, the app and settings will automatically cut off the traffic for you. We can try to turn off the traffic limit or increase the level of the traffic limit.

How to turn off data throttling.

There's no traffic management.

If your phone doesn't have this setting on its own, you'll have to manually turn off the data. It needs to be reopened.

The software running in the background should be turned off. Save data.

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

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

The mobile terminal supports China Unicom 4G network;

The location has a 4G network covering China Unicom;

The number card is a USIM card, and the ** speed limit is used, and the traffic used in the current month reaches the speed limit threshold, and the speed limit occurs.

You can check whether the above conditions are met, and you can use the China Unicom 4G network only after they meet the requirements.

This means that your mobile phone card has enabled 3G data, and you are using the network within the coverage of the 3G network, so the Internet icon will show 3G.

1. The mobile phone can only use the 3G signal, because there is no 4G signal in the area, and only the 3G signal is covered, and the network will automatically become 3G.

2. Mobile phone network type setting, mobile phone network type is set to only use 3G model, at this time, the mobile phone will turn off 4G Internet access and only use 3G Internet access, in this case, you can set to change the network type in the mobile phone settings, change to 4G priority, and you can resume 4G Internet access.

3. If the phone system is abnormal, you can try to restart the phone in this case.