ASCII.jp I tried HIS Mobile, which is a cheap SIM, calling for a fixed amount of calls, low cost, and high -quality calls without an application.

　MVNO's cheap SIM, which has various new plans this spring, is advantageous to reduce smartphone rates.However, for calling functions, there are some parts that require a dedicated application in order to make a flat rate or cheaper, or that is disadvantageous due to sound quality issues.However, there is a cheap SIM that corresponds to a fixed call and high -quality calls without a dedicated application.That is "HIS Mobile", which provides services with the cooperation of Nippon News and HIS.

SIM from HIS Mobile.It was a multi -cut SIM

HIS Mobile provides services in cooperation with Nippon Telecommunications

　HIS Mobile is a service by a subsidiary of HIS, which is familiar with travel agencies, but seems to be based on the Japanese community of the subsidiary, Nippon Newsletter.

　The feature of HIS Mobile is that there are more options, such as reducing the amount of communication compared to the Japanese communication service, can reduce the minimum fee.

　This time, the contract started in the "cheap step plan" started in June.If the traffic is 1GB, it costs 590 yen per month.From there, it can be added for 275 yen per 1GB.In addition, if you set 3GB a month in advance, it will be 790 yen per month, and 5GB per month costs 1190 yen per month.Furthermore, the fixed call is "all -you -can -talk for 5 minutes", which can be used for 5 minutes at a time, and costs 700 yen a month.

Voice SIM is 590 yen per month for 1GB and 790 yen for 3GB.It is the cheapest class among the cheap SIMs, and there is also a characteristic of the call function.

　By the way, compared to the Japanese communication service, the "reasonable plan for everyone" is relatively close.The "reasonable everyone's plan" is 6GB a month, with a free call of 70 minutes a month and costs 1390 yen a month.Nippon communication is also attractive if it matches up to 70 minutes a month than the flat rate up to 5 minutes each time.Even if both of them exceed the free call, it is 11 yen per 30 seconds, which is cheaper than a normal call.

　And Nippon Telecommunications and HIS Mobile have convenient points for those who value voice calls.Despite the cheap SIM of MVNO, even if you do not use a dedicated application, you can make a fixed call, inexpensive calling charges, and high -quality calls.

In order to send from a cheap SIM cheaply, a dedicated application is generally required and the sound quality is inevitably inferior by relay telephone.

　Currently, the general calling fee for mobile phones is 22 yen per 30 seconds, three major carriers and cheap SIMs.If you have three major carriers, you can use a flat rate of calls from there to make you unlimited, and in a cheap SIM, you can broadcast another telephone company to make a fixed call rate and a low fee.

　At this time, in order to relay another telephone company, it is necessary to add a specified number before the normal phone number (prefix).The dedicated application is automatically performed this work, and the flat rate is applied only in that case, and the call fee is cheaper to 11 yen for 30 seconds.

　It is necessary to be careful when transmitting from the incoming call history.If it is transmitted from the standard call application as it is, the price will be 22 yen per 30 seconds, or it will be excluded from the flat call.

　This is inconvenient for users, and it is disadvantageous for cheap SIMs, so as a result of discussions with the Ministry of Internal Affairs and Communications, the three major carriers in 2021 are referred to as "automatic prefix numbers" for MVNOs.We have started providing services.This is to automatically add a number on the carrier equipment side.OCN Mobile ONE, Libmo, etc. are adopted, and it is already possible to make a fixed call and low charge without using a dedicated application, and many businesses are planning to respond later this year.

　However, there is still a disadvantage in the case of using the relay telephone mechanism.That is not an HD call in terms of sound quality.At present, calls between mobile phones often become not only the same businesses but also clear and high -quality "VOLTE (HD+)", making it easier to talk than before.However, on relay telephone, the route is different, so it does not cause high -quality calls, and the sound quality of the traditional mobile phone is obtained.

With a dedicated application, a flat -rate call, high -quality calling, so the price is low

　Although the explanation has become longer, HIS Mobile is a cheap SIM, but even if you do not add a number in front of the dedicated application or phone number, there is a clear call fee and a clear Volte (HD+) call.It has been realized.

When it is transmitted from HIS Mobile, it is marked with [HD] before the number of calls, resulting in clear sound quality.

IIJMIO and sent a pre -fix.There is no sign of [HD], and the sound quality is normal as a mobile phone.

　The reason for this is that Nippon Newsletter has reduced the price with the normal calling function in anticipation of the price reduction of the wholesale fee for DOCOMO's voice call.This year, the actual audio wholesale fee was decided, but the other MVNOs were not followed (selected the "Automatic prefix number" and relay telephone combination), and without a dedicated application for Nippon News and HIS Mobile.It provides inexpensive call charges and high -quality calls.