Is China s 3G going to rebuild the network, and the current network will not be used?

Simply to say to you, the development of domestic networks is backward compatible, that is, 3G network compatible generation network, as long as you don't use 3G new business, you don't need to change your mobile phone, I don't know if you have seen it, now there are still people using Big Brother, that is the first generation of mobile phones, how can it take more than ten years!

If you mean that your mobile phone number can only use the Unicom 2G network, but cannot use the 3G network, you need to meet the following three conditions to use the Unicom 3G network

1. Use China Unicom 3G** or ** have opened the 3G network function;

2. The mobile phone supports China Unicom 3G network;

3. The location has a 3G network covering China Unicom.

If the mobile phone **is 3G** but cannot use the 3G network, it is not excluded that the mobile phone does not support the 3G network of Unicom Pengsheng or the local coverage of Unicom 3G network in Qisen, when the Unicom 3G network cannot be used, it is quietly and mu will use the Unicom 2G network by default, and you can contact the local Unicom customer service for details.

In China, there are three kinds of mobile TD Unicom WCDMA Telecom CDMA2000

Unicom's network is relatively mature, use WCDMA.

China Unicom is WCDMA, China Telecom is CDMA2000, and China Mobile is TD!

According to the information you provide, if the mobile phone supports the 4G normal car can use the 4G network, if you can't use it, please pay attention to the following conditions for using the imitation roll:

1. Use China Unicom 4G** or ** has opened 4G network function;

2. The mobile phone supports China Unicom 4G network;

3. The location has coverage of Unicom 4G network.

If the mobile phone is 4G** but cannot use the 4G network, it is not excluded that the mobile phone does not support the Unicom 4G network or the local network has no coverage of the Unicom 4G network, when the Unicom 4G network cannot be used, the backup will use the Unicom 2G and 3G network by default. The poor mobile phone signal is because the signal will be affected by various factors such as terrain, landform, and high-rise buildings during the propagation process, and if you are in a relatively closed place, the signal will be affected. You can restart your phone, or change the SIM card to a family friend's phone to try again, and see if the signal of other connected users around you is working.

Hello dear Samsung users:

According to your description, Samsung G3812 model phone supports 3G network.

1.Turn the phone on and off again and insert the Unicom mobile phone card into the main card slot.

3.Test whether this is the case in different geographical locations to preliminarily rule out network coverage.

4.If possible, change the SIM card for testing.

5.Update the system version of your phone.

6.(Back up data: **book, SMS, multi**, etc.), it is recommended that you restore the factory settings.

If it still can't be solved after factory reset, it is recommended to send the phone to the nearest Samsung service center for testing and further processing. For specific service center inquiries, please click:

Mobile 3G is Datang's technology, which is only used by China Mobile in the world, and Datang's licensing fee is very high. Apple will not support mobile 3G now or in the future.

Hello: According to your description, it is recommended that you try it by following the steps below:

2.Since you didn't provide a specific model, check if your phone supports the 3G network of the carrier you are using.

3.Try changing a SIM card.

4.Update the system version under the attempt.

5.Back up your phone's data (book, SMS, multiple files, etc.) and restore factory settings.

Hello dear Samsung users:

We recommend that you try the following steps:

1. Check whether the SIM card is enabled for GPRS Internet service or temporarily closed.

To use the mobile phone data Internet function, the ** card needs to activate the data data Internet service. You can contact the local network provider of **card** to open the data traffic Internet service.

2. Check whether the "Mobile Data" switch is turned on.

Slide your finger down on the top curtain of the screen, slide the shortcut bar to the left, and turn the "Mobile Data" dot green.

3. Reset the Internet access parameters.

In standby mode, select Standby Screen - Applications - More Settings - Mobile Network - Tap the access point name - Menu - Reset to Default Settings - After the settings are completed, restart your phone to surf the Internet.

4. Please try to change to another ** card.

5. You can also try again in a different time period or network environment.

6. Back up your phone's data (book, text messages, etc.) and restore your phone to factory settings.

If the fault persists, it is recommended that you send your phone to the nearest Samsung service center for testing and repair.

Samsung knows that we will provide you with high-quality solutions and answer your questions attentively, and hope to get your satisfactory evaluation.