Why can't a number with a port number be called in HD?

Recently, the "port number transfer" service was piloted in the whole country, and many netizens enjoyed the preferential packages of other operators through network transfer, which was really convenient. However, one of the biggest problems existing in the current port number transfer is that mobile and Unicom users can't turn on VoLTE, that is, high-definition calling function, after switching to telecommunications. According to netizens' tests, sending a short message with VoLTE function to telecom will prompt the service failure. Even if the VoLTE function is forcibly turned on in the mobile phone, there will be problems that the mobile phone cannot dial and talk. What is willing to cause this problem, telecommunications officials do not have a clear statement, there may be two kinds of speculation:

The first point is that China Telecom's VoLTE itself has just officially started running. It took less than half a year from the commercial trial in the second half of 20 18 to the official opening in March. In such a short time, it is quite good that telecom can ensure that the original users can enjoy the VoLTE function. However, users who transfer numbers to the network involve the problems of the original network and the existing network. Because the network technologies of the three major operators are not exactly the same, there may be technical obstacles, which leads to the delay in opening VoLTE for these users.

The second point is that the port number transfer itself is also being tested, and it is not an officially enabled function. Since it is a test, there are bound to be some problems. Technically speaking, port number transfer is not just a simple matter of transferring the numbers of other operators to telecommunications, and some repeated adjustments may be needed during the testing process. The main task of the operator in the testing stage is to ensure that users with number transfer can answer the phone and surf the Internet normally. As for the function of VoLTE HD calling, it does not affect the normal use of mobile phone numbers, so its debugging is put in the later testing stage.

At present, the main purpose of telecom VoLTE is to ensure that the mobile phone will not be disconnected during the call. It can be said that it is not a necessary function. Even Apple mobile phone users cannot enable this function without upgrading to the latest iOS 12.2 system. Therefore, users who cannot use VoLTE after port number transfer need not worry. The problem will be solved when the function of telecom VoLTE is stable. In addition, users who intend to transfer their numbers to the network and rely on VoLTE, it is best to ask the target operator before transferring the network. If it is confirmed that VoLTE cannot be opened, the plan of network transfer can be postponed.

Invited to answer questions in this industry.

At present, the number with port number can't talk in high definition, which is a technical specification problem. Although it involves the cost of operators, it is only a matter of time before this problem is solved.

Number portability means that users can change operators without changing their phone numbers. Transplanting the number to the internet is not a magical thing. In fact, many foreign countries have already implemented it. After a long period of pilot work, China has definitely started to implement this business nationwide.

Because the port number transfer service involves the handover of new and old operators, even after the handover, it also involves future paging and other business processes, so there must be corresponding norms. When the port number transfer began to be piloted, it was the 3G era. At that time, there were no 4G services such as Volte, so the original specification proposed by the Ministry of Industry and Information Technology only considered 2/3G port number transfer.

According to the process at that time, NPDB was introduced to store the user database of port number transfer. At the same time, the billing system has also been reformed.

A user X is transferred from operator A to operator B. If other users call this mobile phone X, there will be a series of processes to ensure the completion of the voice call, and the key point of this process is the NP-HLR newly added by the two operators.

Simply put, other users will not know that this user X has switched networks, and will continue to go to operator A to page this user. In the NPDB of operator A, it is recorded that this user has been transferred to operator B, and the call will be transferred to the system of operator B. Operator B will also check its own NPDB to confirm that this user belongs to itself, and then carry out related call flow.

This is the call flow of 2/3G port number transfer.

Volte's voice call traffic is different from the original 2/3G traffic, so this traffic cannot be used. The problem now is that the popularization speed of Volte services of the three major operators is different. China Mobile has already completed the commercialization of Volte service, China Telecom only started the commercialization of Volte service last year, and China Unicom is currently in the trial commercial stage, so the Volte process of port number transfer has not yet started.

It takes time to formulate specifications, and operators need to add new equipment and transform the call process if they want to realize the port number transfer in Volte, which requires a lot of work and investment and is difficult to complete quickly.

5G is coming, and the original voice solution of 5G is 4G Volte, so this problem will definitely be solved. In the early stage of 5G, due to the problem of operators' 5G deployment, in order to ensure that users will not switch between 4G and 5G frequently, all the previous 5G voice schemes were dropped back to 4G, and Volte was used to carry voice. In other words, 5G must use 4G Volte. Now it's not a problem that number portability users can't use Volte, but a problem that they can't use 5G. In order to push the port number to the network, we must solve the Volte problem from the port number to the network.

Therefore, the Ministry of Industry and Information Technology must also pay attention to this issue, and it is necessary to promote Volte.

In a word, users who transfer numbers to the network can't open Volte now, mainly because the process of transferring numbers to the network in Volte is unclear and belongs to technical specifications. However, this issue has a greater impact in the 5G era. It is estimated that the Ministry of Industry and Information Technology will also issue corresponding specifications to promote the port number transfer to Volte. It's also a matter of time.

IPhone finally updated the telecom Volte service in iOS 12.2, but the number portability user does not support telecom volte! These words are very hurtful. Why are users with port numbers being treated differently? So unfair, after all, why?

I20 18 12 1, Tianjin, Hubei, Yunnan, Jiangxi and Hainan have officially launched the new "port number transfer" process. This process only needs you to operate through SMS, and then you can transfer the network!

However, it is followed that users who transfer numbers to the network cannot turn on the volte HD voice call function! Especially after the current iPhone is turned on, this function still cannot be used!

In fact, there are both policy and technical reasons for not supporting VoLTE after port number transfer.

The policy is: at present, port number transfer is still in the trial operation stage, and many contents are not so mature. It is estimated that port number transfer will not be fully implemented before 2020, which is a gradual process.

From 20 10 and 1 1, pilot port number transfer will be carried out in Tianjin and Hainan; Landing in Jiangxi, Hubei and Yunnan provinces in September of 20 14; Starting from 20 18, 12 and 1, Tianjin, Hainan, Jiangxi, Hubei and Yunnan are five pilot provinces and cities. This is a propulsion process!

Technology: Because there are still many incompatibilities in the port number transfer from mobile or telecom, such as the different standards between telecom and mobile 4G networks, etc., technical coordination is needed.

So don't support it for the time being, don't worry. I believe we can do it in the future.

Why can't a number with a port number be called in HD? On this issue, in fact, we found the key point, that is, what is the reason why we can't make high-definition voice calls after port number transfer, and why we can't make high-definition voice calls. Let me tell you something about this.

Let's talk about what the port number transfer service is. During this period, you may have heard a lot about port number transfer. In fact, in March this year, the state has allowed users to carry out port number transfer by letting operators speed up and reduce fees. The so-called port number transfer means that we can transfer our mobile phone number to other operators through network transfer to enjoy or use some preferential business packages of relevant operators.

Second, why can't I use high-definition voice calls after port number transfer? At present, there are five pilot projects of port number transfer in China, namely, Tianjin, Yunnan, Hainan, Hunan and Jiangxi, which means that users in these five places can handle port number transfer services, and users in other places will promote them nationwide after the trial stage.

However, there is a strange problem. Users of China Mobile and China Unicom will find that they can't use the previous high-definition calls after switching to telecom. The biggest reason is one of the technical reasons of telecommunications. Because the technologies of the three major operators are the same, if users of China Mobile and China Unicom switch to telecommunications, it is necessary to constantly optimize and improve the telecommunications technology, so that users transferred from China Mobile and China Unicom can use the high-definition voice calling function of telecommunications.

Third, some objective factors of the port number transfer service As I said above, the port number transfer service is officially in the trial operation stage, and many aspects are still not very mature. At present, only users in Tianjin, Yunnan, Hainan, Hunan and Jiangxi can handle the port number transfer service, and this service needs continuous optimization and trial operation before it can be finally promoted. These are some objective factors.

Finally, to sum up the problem that HD calls cannot be made after port number transfer, there are two main factors. The technical reason is that the technologies of the three major operators are different. Switching to other operators needs to constantly optimize the technology, and there are some problems objectively, which will lead to the inability to make HD calls after the port number is transferred to the network. So if you have any different opinions, please leave a message below and discuss it together!

It's just a string of authorization codes that can be written into the system. There are so many technical problems, and the problems are all people playing tricks!

What belonged to you suddenly slipped away under your nose. Are you comfortable? This is exactly how operators feel about port number transfer. In order to prevent users from experiencing the comfort of other homes just after switching to the internet, technical deficiencies can actually appear. And you can't make HD calls, that's why.

According to the official statement, there are two reasons:

The first is the lack of technology. It has only been a few months since the port number transfer was put forward. In fact, it is still very difficult for such a complex communication company to complete the conversion within these months. After all, the service schemes adopted by the three major operators are different, because with port number transfer, it is necessary to achieve perfect docking, which is actually not that simple.

Secondly, the port number transfer is still in the testing stage. Therefore, it is not that such a situation is not allowed. Maybe in the testing stage, the HD call itself is not planned. After all, many aspects have to be adjusted after the transfer, and it is not easy to use after the transfer. People need time to get to know each other when they go to a strange place, let alone a mobile phone card.

I think the above three are the biggest reasons. Excluding the official statement, in fact, the three major operators are more or less selfish. They don't want to send the number online. After all, such a market is too extreme and breaks the original balance. But they couldn't help it, so they played a little narrow-minded to vent.

However, this situation will not last long. After all, it is still in the testing stage of port number transfer. After the real success, such technical loopholes will not appear again.

First of all, I don't know when you asked the question. From 20 19, 1 1, all operators can carry numbers to all parts of the country. Being trapped for more than ten years, I transferred my number to the Internet starting with 12.

It is not so easy to transfer the port number from mobile to network. 1 1 At the end, i query asked me if my mobile card could be transferred to the Internet, and the SMS reply was qualified. On 12, when I went to the telecom business hall to prepare to switch to telecom, I found that Mobile signed a so-called internet access agreement for me, and I can't switch to the internet after 1 year! 10086 After the complaint, the Ministry of Industry and Information Technology complained. Finally, I passed four mobile halls and queued for two hours. Mobile customer service took less than three minutes, and the agreement was cancelled with a few mouse clicks! The next morning, I successfully transferred to China Telecom with my mobile phone number 138. It's a lie to find that you can't receive the verification code after switching to telecom, and anything without HD call is a lie!

After the completion, the telecom customer service specially told me not to pay the phone bill online for the time being, for fear of paying it on my mobile phone. But when I asked about it in the afternoon, I found that the problem had been solved. As for high-definition calls, the high-definition logo in front of the mobile phone signal is lit up the moment you plug in the mobile phone card after the transfer. On the contrary, the original Unicom card of my mobile phone received the upgraded HD call message, and the HD logo appeared!

As long as you think the new operator's network and package are suitable, the new operator is still very fragrant. Don't be fooled by the rumors of the original operator. Good luck!

It has nothing to do with anything, but artificially creates some troubles and teaches you not to make good use of other people's network.

The feeling is artificial, not technical.

Volte high-definition phones between operators can't be truly interconnected and can only be degraded to ordinary voice.