台湾の通信エリア

台湾 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88 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、27 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。

台湾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Chunghwa、FarEasTone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。

台湾の携帯キャリア

• Chunghwa Telecom: Chunghwa Telecom is Taiwan's largest mobile operator, with about 11.2 million subscribers excluding IoT SIMs at the end of 2025, a 39.7 percent share of customers and 40.8 percent of mobile service revenue. By then 46.4 percent of its smartphone users were on 5G.
• Chunghwa Telecom: Chunghwa launched 5G on 30 June 2020, and its 5G licence runs until 31 December 2040. In May 2022 it bought a further 2x10 MHz in the 900 MHz band, with equipment, from Asia Pacific Telecom.
• Taiwan Mobile: Taiwan Mobile completed its merger with Taiwan Star Telecom on 1 December 2023, after 23 months of preparation covering IT systems, network integration and customer rights, and said the combined company served 10.28 million subscribers.
• Far EasTone: Far EasTone completed its merger with Asia Pacific Telecom on 15 December 2023. It says the merged operator holds 980 MHz of 4G and 5G spectrum, including 120 MHz for 5G, the most 5G bandwidth of Taiwan's three networks.
• Far EasTone: Asia Pacific Telecom customers kept their SIM cards and tariffs after the merger, and their phones continued to show the GT network name. Far EasTone set out to consolidate base stations, replacing 5,000 sites, which it said would nearly double coverage for former Asia Pacific users.

台湾の旧世代ネットワーク

• Taiwan's 3G licences expired on 31 December 2018, a year after the country closed its 2G networks. At the start of 2018 the regulator counted more than 6.43 million 3G users who still had to move to 4G, against about 22 million already on 4G.
• 3G data ended in 2018 but 3G voice stayed on because VoLTE was not yet mature. The regulator then scheduled the end of 3G voice for 30 June 2024, after which calls and data run only over 4G and 5G.
• With 3G gone, a phone that lacks VoLTE or has no NCC type approval cannot make calls on Taiwanese networks, and that includes the emergency numbers 110, 119 and 112. Older handsets are the ones to check before travelling.

台湾の5G

• Taiwan's 5G auction closed on 21 February 2020 after raising NT$142.191 billion. In the 3.5 GHz band Chunghwa took 90 MHz, Far EasTone 80 MHz, Taiwan Mobile 60 MHz and Taiwan Star 40 MHz, while 28 GHz blocks went to Chunghwa, Far EasTone, Taiwan Mobile and Asia Pacific Telecom.
• Licence rules required each 3.5 GHz winner to build at least 1,000 5G base stations in that band within five years, and 28 GHz holders at least 375 per 100 MHz held. Winners of the 2019 bands also had to cover half the population with 5G in that period.
• As a condition of approving the 2023 mergers, the regulator required Taiwan Mobile and Far EasTone to raise 4G coverage to 99 percent and 5G coverage to 98 percent by 2027, with 5G coverage in rural areas at 95 percent.

台湾のネットワークについて

• Chinese vessels damaged both undersea cables linking the Matsu islands to Taiwan, on 2 and 8 February 2023. Residents spent 50 days with little or no internet until the TAIMA No. 3 cable was repaired on 31 March 2023.
• Chunghwa Telecom has recorded more than 20 incidents of damage to the cables between Taiwan and Matsu in five years, and said two more cables to the outlying islands were due for completion in 2024 and 2025.
• In June 2025 the Tainan District Court sentenced the Chinese captain of a Togolese-registered freighter to three years in prison for deliberately damaging the undersea cable between Taiwan and Penghu in February that year.
• In early January 2025 a Chinese-owned freighter was suspected of damaging an undersea cable near Keelung Harbor in northern Taiwan. Chunghwa Telecom said the break did not affect internet service across the island.
• Chunghwa Telecom distributes OneWeb low Earth orbit satellite service. The constellation completed coverage of Taiwan and its offshore islands in March 2025, and commercial service for government and enterprise customers began in June 2025.
• Chunghwa describes submarine cables as Taiwan's indispensable international route that satellite and microwave links cannot replace, and notes that completion of its APRICOT cable has been postponed to 2028.