Why do some people display 4G+ in the notification bar of their mobile phones, while others display HD?

There are many things displayed in the mobile phone notification bar, such as 4G+, 4G, HD, 4G+HD or 4GHD and so on. Let's have a look. What is 4G+ and what is HD?

First of all, what does 4G+ mean? We know that the peak speed of 4G network can reach 100Mbps per second, while the peak speed of 4G+ network can reach 300Mbps. And we know that 4G+ is actually an upgraded version of 4G network. To put it mildly, it is to improve the speed of 4G network, and 4G+ adopts carrier aggregation technology.

Now as long as the mobile phone itself supports 4G+ and the region supports 4G+, it can be supported. Of course, sometimes, we may see 4G display in some places, and sometimes, we may see 4G+ display.

So, what is HD?

This is the most popular volte function at present. Recently, Telecom launched the trial commercial volte, 165438+ on June 29th, and this function, called high-definition voice call, means that when you are talking with others, you can talk directly with your mobile phone without disconnecting from the network. And HD is high-definition voice. Of course, this function can be cancelled. Go to Settings-(More Connection Settings)-Mobile Network-HD Voice-and then select Close.

So we are in different areas, because the cell phone signal is good or bad, the cell phone will display 4G+ or 4G, and this symbol may appear because HD is enabled.

The high definition is displayed on the mobile phone because you have turned on Volte. VoLTE is an IMS-based voice service. VoLTE (VoiceoverLTE) is an IP data transmission technology. All services are carried on the 4G network, which can realize the unification of data and voice services under the same network without 2G/3G network. In other words, 4G networks not only provide high-speed data services, but also provide high-quality audio and video calls, all of which require VoLTE technology.

The following is a list of ways for mobile phone manufacturers to open VOLTE: In order to have a better call experience, it is recommended that you open Volte function, which only charges normal call fees and does not charge function fees. The method for China mobile users to open 4G HD voice calls: first send ktvolte to 10086.

1. After receiving the confirmation message, Huawei mobile phone clicks Settings, More and Mobile Network Settings to open the VOLTE call option, and then restarts the mobile phone.

2. After receiving the confirmation message, vivo phone clicks "Settings" and "Phone" to turn on the VOLTE call option, and then restart the phone.

3. After receiving the confirmation message, 3. OPPO phone clicks "Settings" and "Phone", turns on the VOLTE calling option, and then restarts the phone.

4. After Apple's mobile phone receives the confirmation message, click "Settings" to enter "Cellular Mobile Network" and "Enable 4g", then check "Voice and Data" and restart the mobile phone.

5. After Xiaomi's mobile phone receives the confirmation message, click Settings, Dual Card and Mobile Network to start the VOLTE HD call, and then restart the mobile phone.

6. After receiving the acknowledgement message, Samsung mobile phone opens the settings, moves the network, turns on the high-definition voice, and then restarts the mobile phone.

7. After receiving the receipt SMS, Meizu mobile phone opens the settings, dual card, mobile network, turns on VOLTE, and then restarts the mobile phone.

The way to judge the success of enabling high-definition voice is that the mobile phone signal keeps displaying 4g instead of 2g during the call, and the time from the call to the standby ringing is obviously shortened (from 9 to 12 seconds to 2 to 3 seconds), indicating that the call is successful.

4G+ is a general term for international and mobile Internet industry to upgrade 4G networks, which is used to describe and explain 4G networks applying LTE-A carrier aggregation technology. The most outstanding and core performance of the 4G network using LTE-A carrier aggregation technology is the doubling or even several times of the network speed of 4G. However, the accelerated 4G network is collectively referred to as 4G+ or 4Gplus in English because it does not adopt subversive and leap-forward new technologies (such as 5G technology with network speed 100G/S).

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The display of 4G+ on your mobile phone means that your mobile phone is within the coverage area of the operator's 4G+ signal. 4G+ is LTE-A, also called carrier aggregation, which can double the network speed.

The display of HD on your mobile phone means that you have turned on the VoLTE function. VoLTE stands for Voice over LTE, which stands for 4G HD calling. VoLTE is essentially a voice service based on IMS, which can realize high-definition voice and video calls on 4G networks without interruption. Compared with 2G/3G voice, VoLTE voice is clearer and more reliable, and the connection time when making a phone call is greatly shortened.

Both 4G+ and VoLTE need mobile phone hardware support. At present, brands like Redmi can support thousand yuan mobile phones. 4G+ does not need to apply for service. As long as your mobile phone supports it and it is within the coverage area of 4G+ signal, you can enjoy 4G+ high-speed Internet access. In addition to mobile phone support, VoLTE also needs to apply to the operator to open this service.

VoLTE of China Mobile has been commercialized for almost 3 years, and it can be opened by SMS. The method is: send a short message ktvolte to 10086, and follow the returned short message prompts. Then you need to turn on the VoLTE HD calling option in the phone settings.

VoLTE of China Telecom has just started commercial trial, and it can be opened by SMS. The method is as follows: Send a short message to ktvolte to 1000 1, and follow the returned short message prompts, or call 10000 customer service phone to open it manually. Then you need to turn on the VoLTE HD calling option in the phone settings.

VoLTE of China Unicom is being deployed, and there is no commercial news yet.

There are 9160,000 mobile users nationwide, including 698 million 4G users, with a net increase of 45.78 million.

China Unicom has 309 million users, and the number of 4G users is 2140,000, with a net increase of 38.97 million.

The number of mobile subscribers of China Telecom reached 294 million, and the number of 4G subscribers reached 230 million, with a net increase of 484 100, ranking first in increment.

The 3GPP organization has not stopped the evolution of LTE, and proposed LTE-A to meet the higher demand and more applications in the wireless communication market in the next few years, to meet and exceed the requirements of IMT-Advanced, and to maintain good backward compatibility with LTE. LTE-A adopts key technologies such as carrier aggregation, enhanced UL/ downlink MIMO, cooperative multi-point TX&Rx), relay and enhanced inter-cell interference coordination for heterogeneous networks, which can greatly improve the peak data rate, peak spectrum efficiency, cell average spectrum efficiency and cell boundary user performance of wireless communication system, and also improve the networking efficiency of the whole network, which makes LTE and LTE-A systems become the mainstream of wireless communication development in the next few years.

Therefore, the 4G+ promoted by operators only refers to carrier aggregation, which is not equal to LTE+.

China Unicom adopts dual 4G, namely TD-LTE and LTE-FDD hybrid networking, which supports multiple frequency bands. In order to provide users with upload and download speed and use the existing network frequency band more efficiently, China Unicom has continuously upgraded its network, and the network supporting carrier aggregation can support 300Mbps, but what is the reality?

Look at the average download speed of each operator below.

As for HD, it actually refers to HD voice, that is, the SIM card that displays HD can already use volte service (HD voice).

China Mobile has launched volte voice service for more than two years. Recently, China Telecom announced a nationwide trial commercial. China Unicom has mastered 3G (the superiority of WCDMA voice call), and now it is building a volte network on 4G.

There are many articles on the Internet introducing the advantages of VOLTE, but I think what impresses our consumers most is the improvement of call quality (clarity and delay), which can realize the unification of network transmission data and voice services under the same network, that is to say, playing games on the 4G network will not drop the line even if a phone call comes in, and bid farewell to the glory of "cheating" and "reporting" of the king.

Especially for telecom card users, it solves the confusion that dual telecom card users cannot use two telecom cards at the same time. Qualcomm platform supports dual VOLTE function from SDM845 and SDM660 platforms (new baseline), that is, when the primary card selects 234G, the secondary card selects 4G. When the secondary card volte function is turned on, the secondary card can make and receive calls normally.

Thanks for reading! If there is anything wrong, please point out. If you feel ok, please leave your praise and attention. Thanks again.

In fact, these are two different definitions of mobile phone service. 4G+ stands for CA (carrier aggregation), and HD is a professional communication technology, which has witnessed the development of network services in the communication era.

From the early 2G network to the later 3G network, and then to 4G and 4G+, 4G+ is to bind multiple carrier aggregation of LTE together, and bind the 20M bandwidth of multiple LTE together for a single user to achieve higher speed.

HD stands for high-definition voice, not just VOLTE.

However, in fact, this does not have much impact on the use of mobile phones by ordinary users. Now the performance of mobile phones is getting better and better, the network speed is getting faster and faster, and it is very convenient to surf the Internet.

Moreover, the 5G era is coming, Lenovo's 5G mobile phone has taken the lead in listing, and more 5G mobile phones will appear later. The three major operators and head enterprises like Qualcomm are ready for the 5G era.

By then, 4G+ will also become history.

Invited to answer questions in this industry.

The 4G+ and HD displayed on the mobile phone notification bar represent two different definitions, 4G+ stands for CA (carrier aggregation) and HD defines high-definition voice.

When LTE first appeared, operators advertised that LTE was 4G in order to be different from the previous 3G, but in fact, LTE itself was a 3.9G product, and LTE-A subsequently evolved into a 4G network conforming to ITU-20 10 standards.

When the operators began to deploy LTE-A networks, because the term "4G" had been occupied, a term "4G+" came into being, that is, 4G+ we saw on the mobile phone notice bar.

However, the main difference between 4G+ and 4G is that 4G+ combines the multi-carrier aggregation of LTE, and binds multiple 20M bandwidths of LTE for a single user to achieve higher speed. This+can be understood as evolution or "plus sign in mathematics".

For example, the 4G+ of telecom is to aggregate the 20M Band 1(2 100M) and 15M Band3( 1800M) of telecom for a single user to realize the download speed of 20M band 150 Mbps.

HD stands for high-definition voice, not just VOLTE. At present, both Wcdma and VOLTE technologies in 3G adopt high-definition voice technology. At present, both technologies adopt 23K speech coding, and the call experience is the same.

The HD seen on the mobile phone cards of China Mobile and China Telecom must be VOLTE, while the HD seen by China Unicom during the call may be WCDMA. At present, China Unicom has only tried VOLTE in some areas, but now China Unicom is testing the VOLTE function nationwide, because it is inseparable from VOLTE, and 5GNR needs VOLTE to support voice.

4G+hd refers to LTE-A network, which supports carrier aggregation's network and is faster than 4g hd. HD is a VOLTE network, and 4G network carries voice.

HD is displayed at the top of the mobile phone screen, indicating that VoLTE HD voice service of China Mobile has been started.

1, g refers to 2G network, which is the abbreviation of GPRS. It is a mobile data service developed from GSM network, and it is the slowest representative of mobile phone network at present.

2, e is the abbreviation of EDGE, which belongs to enhanced GPRS and belongs to 2.75 g. It's a little faster than g!

3. 3G refers to the ordinary 3G wcdma network, which is faster than G and E. ..

4.h is the abbreviation of HSPA, high-speed packet access, which is the development of WCDMA 3G network and is considered as a 3.5G network. It is the fastest 3G at present.

5.4G is a TD-LTE network. At present, the Ministry of Industry and Information Technology has just officially issued a 4G license. At present, 4G is the fastest in all networks. Theoretically, the downlink peak can reach 100Mbps.

6. Finally, in general, speed comparison: 4G>H & gt3G & gtE>g.

As a mobile user or a user like Unicom, I deeply understand that you can't surf the Internet when you answer the phone. Sometimes when you suddenly receive a phone call while playing a game, the game will be disconnected. It's not the phone's fault.

4G mobile phone carries out voice communication through 2G/3G signals. When we answer the phone, the system will automatically switch network signals and reduce 4G to 2G/3G. If the mobile phone supports VoLTE technology, this situation will not happen again. Because the 4G network is upgraded from the existing network, different operators have different upgrade bases. For example, mobile may directly rise from 2G to 4G, and China Unicom may directly rise from 3G to 4G, so the system will automatically switch the network signal back to 2G or 3G without the VoLTE function to answer the phone. Therefore, the level to which the specific network signal drops when answering the phone depends on the upgrade basis of the operator's 4G network.

Today, smartphones will support VoLTE technology. Simply put, turn on the VoLTE function on your smartphone and HD will be displayed. The advantage of this function is that the voice is clearer when answering the phone and the waiting time for dialing is shorter. The most exciting thing is that when answering the phone, you still keep the connection of 4G network, and it will not drop to 2G/3G. Therefore, answering the phone while surfing the Internet brings a perfect experience. Generally, mobile phones with VoLTE function are usually turned off by default and need to be turned on manually. Just turn on the VoLTE function in the phone settings-wireless and network-mobile networks, and the phone will display high-definition icons.

The 4G+ mentioned in the title refers to the mobile phone that supports carrier aggregation technology and the carrier network that can realize carrier aggregation. For example, an operator has launched 4G+, and an LTE network in a certain area has also launched carrier aggregation, so you can experience high-speed network with a mobile phone that supports carrier aggregation. It does not mean that the mobile phone can use the 4G+ network if it supports 4G+, but also depends on the coverage of the operator. Therefore, when the mobile phone supports the 4G+ function and is within the coverage of the 4G+ network, the 4G+ icon will be displayed on the mobile phone.

I had this, and suddenly I came out one day. I didn't drive by with my cell phone. At that time, I was worried about what it was, and then I called it and saw that it showed "video call on mobile phone". Does it matter?

Why do some people display 4G+ in the notification bar of their mobile phones, while others display HD? In fact, mobile phones display 4G, 4G+ and HD with different meanings and different functions. 4G indicates that the network speed is fast, 4G+ indicates that the network speed is faster than 4G, while HD has nothing to do with the network speed, but with the call mode.

Below is a detailed explanation of 4G+ and HD.