タイの通信エリア

タイ 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52 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、14 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。

タイ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AIS、TrueMove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。

タイの携帯キャリア

• AIS: Advanced Info Service reported 47.1 million mobile subscribers at the end of the second quarter of 2026, of whom 19.7 million were 5G users, 1.2 million more than in the first quarter.
• AIS: In its 2025 results AIS said its 5G network covered more than 95 percent of Thailand's population, and it reported a 50 percent market share. New SIM activations on its network go through liveness detection backed by AI identity checks.
• True: True Corporation in its current form dates from 1 March 2023, when dtac and True completed their amalgamation under the True name. The combined company began trading on the Stock Exchange of Thailand on 3 March 2023.
• True: True reported 48.6 million mobile subscribers at the end of the second quarter of 2026 after adding 479,000 in the quarter, and 19.3 million 5G subscribers.
• NT: National Telecom, the state operator, was formed on 7 January 2021 by merging CAT Telecom and TOT. It is wholly owned by the Finance Ministry and inherited more than 25,000 towers, spectrum and undersea cables from the two companies.

タイの旧世代ネットワーク

• In July 2025 the NBTC board told AIS and True to submit clear plans to wind up their 2G and 3G networks by the third quarter of 2026, with 2G expected to close first and 3G after it.
• The regulator counted fewer than 3 million SIM cards still using 2G and 3G. Its stated reason for closing them is fraud, since fake base stations exploit weaknesses in the two older systems to send scam text messages.
• Since 30 June 2025 the NBTC no longer allows the import, type approval or certification of devices that support only 2G or 3G, so a handset without 4G is being phased out of the Thai market.

タイの5G

• Thailand auctioned 5G spectrum in the 700 MHz, 2600 MHz and 26 GHz bands on 16 February 2020, raising around 100 billion baht. Five bidders took part: AIS through AWN, True Move H, dtac, CAT Telecom and TOT.
• AIS, through its subsidiary AWN, won 23 of the 49 licences: one in 700 MHz, ten in 2600 MHz and twelve in 26 GHz. True Move H won 17, nine of them in 2600 MHz, and none in 700 MHz.
• CAT Telecom secured both remaining 700 MHz licences, TOT took four 26 GHz licences and dtac two. The 19 licences in 2600 MHz sold for a combined 37.43 billion baht.
• A further spectrum auction on 29 June 2025 covered the 850, 1500, 2100 and 2300 MHz bands, and the NBTC board certified the results on 6 July 2025 by five votes to one with one abstention.
• AIS, through AWN, won three 2100 MHz blocks at 1965 to 1980 MHz paired with 2155 to 2170 MHz for about 14.85 billion baht. True Move H won seven 2300 MHz blocks for about 21.77 billion baht and four 1500 MHz blocks for about 4.65 billion.

タイのネットワークについて

• In October 2025 the NBTC asked its licensees to limit signal radius near the borders so that Thai signals do not leak into neighbouring countries where scammers can use them. Signal close to land borders can therefore be deliberately limited.