What s going on with 4G? What does it mean when a phone shows 4G?

4G is a combination of 3G and WLAN, and can quickly transmit data, high quality, audio, ** and images. 4G is capable of speeds of more than 100Mbps**, which is 25 times faster than today's home broadband ADSL (4 megabytes) and can meet the requirements of almost all 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.

4g？You should be asking about the 4G network.

G is the abbreviation of generation, which means the 4th belt network communication technology.

Theoretically, it can reach a transmission speed of 100m per second.

The Internet speed is getting faster and faster, and of course, the traffic is also fast.

It is a unit of measurement, grams, kilograms, catties, taels, and other words, which he stands for.

4G may be a network transmission standard.

Here's why:

1. It may be that there is no 5G network coverage in your area temporarily.

3. It is also possible that only a single SIM card is supported to open the 5G function, you can check whether the 5G SIM card is placed in the main card slot.

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Open your phone, click on Settings, find "Cellular Network", then click on "Cellular Data Options - Voice & Data", and check "Enable 5G" in it, and you can use the 5G network.

If the 5G network has been enabled, but the 4G signal is still displayed, you also need to confirm whether the area has been fully covered by the 5G network, the 5G network is currently under construction, and there are still many places in China that have not completed the coverage, so even if the 5G mobile phone is turned on and 5G **, the 5G network cannot be used normally.

If you are not sure whether it is covered by the 5G network, you can enter the application software corresponding to the mobile phone card to query, and the 5G signal can be used normally in the place covered by the 5G signal, and only the 4G signal can be used if it is not in the 5G range.

The reason why the phone shows 4G is that the signal is poor.

If you set the mobile network type to use only the 4G model, the mobile phone will automatically block the 5G network, causing the signal display to change to 4G network. Due to the poor signal of the current 5G network and the lack of full coverage, the mobile phone automatically downgrades to receive the 4G network.

The solution for 5G phones to display 4G:

The source can be that the mobile phone card does not support 5G network rushing: 5G mobile network needs to be supported by both mobile phone and mobile phone card to achieve, users can go to the operator service hall to upgrade the corresponding 5G network**, or try to call the operator's customer service** to apply for upgrade or activation (China Mobile 10086, China Unicom 10010, China Telecom 10000).

It may be that the phone settings do not turn on the 5G network: take iPhone 12 as an example, tap the settings icon on the desktop of the phone to enter the system settings menu, drop down the hail height list and click the cellular option. Click on the Cellular Data option on the Cellular page, click on the Voice & Data option on the new page, and select Enable 5G or Auto 5G.

If you have 5G** enabled and your phone supports 5G, you may also automatically switch to 4G in areas without 5G coverage. <>

1. It means that the mobile phone is using the 4G network. LTE, which stands for Long Term Evolution, is a high-speed wireless communication standard for mobile phones and data card terminals. It wasn't until December 6, 2010 that the International Telecommunication Union officially referred to LTE as 4G.

2. There are two standards of LTE system: LTE-FDD and TDD-LTE, that is, frequency division duplex LTE system and time division duplex LTE system, and the main difference between the two technologies is the physical layer of the air interface.

1) The LTE-FDD system uses a pair of symmetrical frequency bands to receive and transmit data for uplink and downlink transmission.

2) The TDD-LTE system uses the same frequency band to transmit in different time slots.

3) Compared with FDD duplex mode, TDD has a higher spectrum utilization.