イギリスの通信エリア

イギリス の数値が意味すること

重要な数値は2つあり、どの会社も引用するのはそのうち1つだけです。一般的な速度は67 Mbps。調子のいいときがどれくらいかを示す数字です。

読む価値があるのは10パーセンタイル、17 Mbpsのほうです。駅の上の基地局が混み合い、周りの全員が同じ電波につながっている、その日の下位1割のときの速度です。中央値が高くて下限が低い国は、本当に必要になるその瞬間まではみごとに動く国だということです。

ビデオ通話やテザリングが欠かせない旅なら、一般的な速度ではなく混雑時の数値を基準に計画してください。

イギリスで回線が混んだときに起きること

混雑は故障ではなく、火曜の夜です。問題は、そのときeSIMに何ができるかで、たいていの旅行用eSIMの答えは「何もできない」です。国ごとに卸契約が1つ、ネットワークが1つ、路上に立ったまま他社のeSIMをもう1枚買う以外に逃げ道がありません。

ここではOrbisloの通信はEE、Threeを通ります。いま乗っているネットワークが劣化したら、旅行の途中でも、お客様が頼まなくても別の回線へ移します。そのときに邪魔をするのではなく、あとからお知らせします。

イギリスの携帯キャリア

• VodafoneThree: Vodafone UK and Three UK merged on 31 May 2025 as VodafoneThree, 51 percent owned by Vodafone and 49 percent by CK Hutchison, with a pledge to invest 11 billion pounds over ten years in a 5G standalone network.
• VodafoneThree: VodafoneThree says its 4G reaches over 99 percent of the UK population and has committed to 5G standalone coverage of 99 percent of the population by 2030 and 99.96 percent by 2034.
• Virgin Media O2: Virgin Media O2 launched O2 Satellite, the first direct-to-device satellite service from a UK network, in 2026, and says it took its landmass coverage to 95 percent. Its network also carries giffgaff, Tesco Mobile and Sky Mobile customers.
• EE: EE's 5G+ network, its most advanced tier, reached more than 44 million people by November 2025. It is offered on EE pay monthly handset plans and selected SIM-only plans rather than to every connection.

イギリスの旧世代ネットワーク

• EE switched off its final 3G site, in Belfast, in February 2024, ending more than 20 years of 3G on its network.
• Vodafone UK completed its 3G switch-off across the country in February 2024 and is reusing the last 3G frequencies to strengthen its 4G and 5G service.
• On O2, a 3G-only phone keeps calls and texts once 3G is withdrawn in its area but loses mobile data. O2 said 3G carried less than 2 percent of the data on its network before the switch-off.
• Three switched off 3G completely in November 2025, so its network carries calls only over 4G Calling, also called VoLTE. A 4G phone without it can still text and use data on Three but cannot make or receive calls, and a 3G-only phone cannot connect at all.
• 2G closes next. EE begins closing its 2G network from May 2029, and at that point 2G and 3G phones, and 4G phones without 4G Calling, lose service on EE completely.
• Virgin Media O2, which completed its 3G switch-off at the end of 2025, starts switching off 2G in summer 2029. 2G carries less than 0.5 percent of data on its network but accounts for more than 10 percent of its cell site energy use.
• VodafoneThree switches off the Vodafone 2G network in spring 2030, and some areas may lose it earlier as a test. Three never had a 2G network, having launched in 2003 as a 3G-only operator.
• Under a government charter, operators must announce a 2G switch-off date at least three years ahead and confirm reliable 4G or 5G coverage before closing 2G anywhere, keeping access to emergency services.
• Once every operator has closed 2G, the technology will be unavailable to everyone in the UK, visitors included, so a visiting phone that relies on 2G will find no 2G network to use.

イギリスの5G

• Ofcom's 2021 auction of 700 MHz and 3.6 to 3.8 GHz spectrum raised 1.379 billion pounds. EE won 3,680 to 3,720 MHz plus 700 MHz blocks, O2 won 3,760 to 3,800 MHz plus 700 MHz, Vodafone won 3,720 to 3,760 MHz, and Three won 700 MHz only.

イギリスのネットワークについて

• The Shared Rural Network, a deal between government and the four operators, met its main target a year early: more than 95 percent of the UK is now within range of a 4G signal.
• Gaps remain in the Scottish Highlands. Parts of the West Highland Way and the Munros Ben Lawers and Ben Vorlich have no 4G from any operator, and new masts are planned for Glen Coe, Wester Ross, Mull, South Uist and Skye.