【iPhone特集】iPhone5s/5c発売1か月、MNP最多はKDDI SB・NTTドコモにないLTEの強みとは

2013年10月7日、携帯電話大手3社は2013年9月末時点の携帯電話契約数を発表。それによると、新規契約から解約を差し引いた純増数は、ソフトバンクモバイルが27万700件と21カ月連続の1位。2位はKDDI(au)で23万2700件の純増、3位のNTTドコモは6万6800件の純減だったという。

iPhoneの販売参入で、MNPによりNTTドコモへの転出が予想されたが、ドコモは9月も13万3100件の転出超過。在庫を持つ他社が、旧モデルを価格を下げて売るなどした影響とみられている。


この「純増数」だが、実はからくりがある。「PhotoVision」なども「一契約」としてカウントされるため、ソフトバンクはこれらの通信モジュールが純増数に大きく影響している。そのため、通信モジュールを除いた「純増数」ではKDDIが首位となるという。MNP転入出状況をみてみると、KDDI(au)が11万800件、ソフトバンクモバイルが2万2700件の転入超過。MNP転入超過数では、KDDIが24カ月連続の1位と圧勝だ。

好調の要因について、まず挙げられるのはKDDIのiPhone5s/5cが、800メガヘルツ帯のプラチナバンドに対応し、かつ基地局数がお多いこと。iPhone 5s/5cは、auおよびNTTドコモの800MHz帯とソフトバンクのプラチナバンドと呼ばれる900MHz帯に対応しているが、ソフトバンクが900MHz帯でLTEサービスを開始するのは2014年の夏以降。また、基地局免許数ではKDDIが3.4万局、NTTドコモが0.2万局と大きく差が開いているのだ。

その他NTTドコモはキャリアメールの不整備や電波状況の悪さが目立った。しかしKDDI(au)がiPhoneに初めて参入したときを思えば、これらのトラブルは"付き物"。本当の勝負はこれからだろう。

【参照リンク】
・iPhone戦線、笑ったのはどのキャリア? 【au強し】【ドコモ苦戦】のワケ(NAVERまとめ)
http://matome.naver.jp/odai/2138117075383342001 

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Johnny Buckland, left, and Chris Martin of the British band Coldplay perform during the Samsung AT&T Summer Krush in Los Angeles, Wednesday, Aug. 3, 2011. The concert benefitted the GRAMMY Foundation and its music education programs for high school students.

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WESTWOOD, CA - AUGUST 03:  Musician Chris Martin of Coldplay performs onstage at Coldplay in Concert presented by Samsung AT&T Summer Krush 2011 benefitting the GRAMMY Foundation and its music education programs for high school students and schools. More info at grammyintheschools.com. Held at UCLA Tennis Center on August 3, 2011 in Westwood, California.

WESTWOOD, CA - AUGUST 03:  Musician Chris Martin of Coldplay performs onstage at Coldplay in Concert presented by Samsung AT&T Summer Krush 2011 benefitting the GRAMMY Foundation and its music education programs for high school students and schools. More info at grammyintheschools.com. Held at UCLA Tennis Center on August 3, 2011 in Westwood, California.

WESTWOOD, CA - AUGUST 03: Chris Martin of Coldplay perform onstage at Coldplay in Concert presented by Samsung AT&T Summer Krush 2011 benefitting the GRAMMY Foundation and its music education programs for high school students and schools. More info at grammyintheschools.com. Held at UCLA Tennis Center on August 3, 2011 in Westwood, California.

WESTWOOD, CA - AUGUST 03:  Guests attend Coldplay in Concert presented by Samsung AT&T Summer Krush 2011 benefitting the GRAMMY Foundation and its music education programs for high school students and schools. More info at grammyintheschools.com. Held at UCLA Tennis Center on August 3, 2011 in Westwood, California.

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WESTWOOD, CA - AUGUST 03:  Musician Chris Martin of Coldplay performs onstage at Coldplay in Concert presented by Samsung AT&T Summer Krush 2011 benefitting the GRAMMY Foundation and its music education programs for high school students and schools. More info at grammyintheschools.com. Held at UCLA Tennis Center on August 3, 2011 in Westwood, California.

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WESTWOOD, CA - AUGUST 03:  Musician Guy Berryman of Coldplay performs onstage at Coldplay in Concert presented by Samsung AT&T Summer Krush 2011 benefitting the GRAMMY Foundation and its music education programs for high school students and schools. More info at grammyintheschools.com. Held at UCLA Tennis Center on August 3, 2011 in Westwood, California.

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MOUNTAIN VIEW, CA - AUGUST 07: Tom Morello performs during the Muse Benefit Concert for Japan Relief at Shoreline Amphitheatre on August 7, 2011 in Mountain View, California.

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apl.de.ap of the Black Eyed Peas performs on stage during FIFA World Cup TM Kick-off Celebration Concert at Orlando Stadium on June 10, 2010 in Johannesburg, Republic of South Africa.

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