Comparing the KDDI version and the SoftBank version iPhone 4S for rates other than fee, what are the strengths and weaknesses of both?

KDDI and SOFTBANK MOBILE iPhone 4S Rate Plan ComparisonNext, we will compare the strengths and weaknesses of the two companies that can not be seen only by comparing rate plans.

◆ Communication speed and communication method
KDDI version ... Maximum downlink 3.1 Mbps, Maximum upload 1.8 Mbps (CDMA2000 1x EV-DO Rev. A method)
SoftBank Mobile version ... Up to 14.4 Mbps downstream, 5.7 Mbps maximum upstream (W-CDMA HSPA system)


The iPhone 4S is not compatible with "WIN HIGH SPEED" of KDDI's maximum 9.2 Mbps downlink and 5.5 Mbps uplink, and as a result that the maximum rating on standards will greatly increase for Softbank Mobile .


◆ Public wireless LAN service
KDDI ... 10,000 strong points (Numbers as of June 30, 2011 at the start of service)
SOFTBANK MOBILE ... 100,000 locations

SOFTBANK MOBILE, which preceded the installation of the wireless LAN spot, achieved 100,000 access points. For KDDI against the end of March 2012, we are expanding the area of ​​"au Wi - Fi SPOT" aiming at establishing 100 thousand locations as of the end of March 2012, todayAnnounced that it acquired the business of public wireless LAN service "livedoor Wireless"doing.

KDDI's "au Wi-Fi SPOT" is different from the preceding competitors, and it has the advantage of being able to use 3G and automatic switching without entering ID and pass from the beginning of service.

◆ usability
KDDI version ... data communication disabled during communication
SoftBank Mobile version ... Data communication during call, incoming call during data communication

Since the KDDI version can not perform data communication and call at the same time because of the communication standards, SOFTBANK MOBILE is advantageous in SOFTBANK MOBILE in terms of competition in online games and net auctions, and in the middle of stock trading in the company's recital We are doing it.


So far it seems that SoftBank Mobile Edition has minutes ... ....?


◆ The biggest focus is still "radio waves"
The biggest factor in talking about the difference between the KDDI version and the SoftBank Mobile version iPhone is exhausted as one word of "radio waves" as well.To put it another way to say that there is no real or lid, the communication speed on the standard also becomes meaningless if radio waves do not enter in the first place whether data communication is possible during a callThat is why.

· SoftBank Mobile that appeals that radio waves have been improved by adding base stations
Softbank made an appeal to dispel the image "hard to connect" by emphasizing the fact that the base station was increased to 160,000 stations at the recital today and that the connection rate approached other companies.


· KDDI with a reputation in the area introduces new technology "EV - DO Advanced" and enables comfortable communication even in densely populated areas
In contrast to KDDI for base station equipment "We have installed base stations considering efficiency as well as numberIn addition, from April 2012 to avoid situations where access speed concentrates on one base station in a densely populated area such as an urban downtown area or a suburban housing complex, and the communication speed drops or connection becomes difficultIntroduced a new technology called "EV-DO Advanced" in the base station equipmentI plan to.

This technology revised that mobile phones adopted a mechanism to communicate only with "base station with the strongest radio waves", confirmed not only the intensity of radio waves but also "base station congestion degree" in real time, To communicate with a vacant base station. As a result, the base station can accommodate about 1.5 times the conventional data, and the throughput (execution speed) at the time of use is doubled on average,The KDDI version iPhone 4S users can not communicate comfortably at the communication speed of the standard, in addition to having a reputation in the area originally, the execution speed does not fall even in downtown areas and so forth,about it.


By the way, since the KDDI version iPhone 4S does not support the frequency of the former 800 MHz band which is stopped on July 24, 2012, some users who are concerned about the area are likely to come out, but when I contact the KDDI public relations department , "We have released "HTC EVO WiMAX ISW 11 HT" which does not already support the old 800 MHz band, but we know that there is practically no problem in practical use"I answered.

· On the sales site of home electronics mass retailers, "KDDI version iPhone 4S is inquired by NTT docomo and SoftBank mobile users" voice
In the Editorial department, I heard about the staff at the cell phone corner of the home appliance mass merchandisers, and the KDDI version iPhone 4S worried about not only au users but also "NTT Docomo and SoftBank Mobile users come to us It was that it was ".

NTT docomo users who boast of the largest area in Japan believe that "If you change your career and the area becomes narrower, it is better for the area to be wider a little," and Softbank Mobile users "It is said that KDDI version will be concerned if more area becomes wider."

◆ Comprehensive judgment of fee, speed, usability, radio waves required
Although I have compared both from various aspects, the point that "which one is better" should differ greatly depending on the scope of action of each user and what you want. Once you consider your lifestyle, I would like to be able to choose the one that suits me.