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

Let's talk about the 4G icon first. The 4G icon on our mobile phone is actually the only sign that our mobile phone can support the use of 4G network, and 4G network has played such a role. 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.

There are also 4G+ icons. Simply put, it is an upgraded version of the 4G network, which uses a function of carrier aggregation. The network using 4G+ can reach a speed of about 300M per second, but to support this function, both the mobile phone and the operator's base station are needed.

Hd this is the most popular volte function at present. Recently, on 20 18 and 165438, China Telecom launched the commercial trial of volte. This function is called high-definition voice call, which means that when you are talking to others, you can talk directly on your mobile phone without disconnecting 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.

HD is high definition voice, which is a free upgrade of ordinary telephone service. VoLTE service, like making phone calls and sending short messages, is a free basic service function that numbers automatically enjoy, and operators will not charge any function fees. This kind of high-definition voice can make the user's voice clearer and dial faster when making a phone call, and if the user often uses his mobile phone to surf the Internet, he can also surf the Internet while making a phone call without interfering with each other.

I don't know if you have ever encountered such a situation, that is, when we were playing a game, a phone call suddenly came in. When we pick up the phone, we will find that the network of the game has been disconnected, and when we re-enter, we will find that we have quit, but using the HD voice call function, there is no such problem.

Second, 4G+. 4G+ is the normal evolution of 4G technology and a more advanced 4G technology. The biggest change in the user experience of 4G+ is the substantial increase in download rate. After China Mobile deploys LTE-A network, the maximum download rate can be increased from 100Mbps to 330Mbps. If the digital parameters of Cat6 and above appear in the terminal information, it can be considered that 4G+ is supported. In terms of experience, the most important thing is that the network speed will be slightly faster than the average.

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.

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.

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.

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.