チェコの通信エリア

チェコ 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64 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。

チェコ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O2、T-Mobile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。

チェコの携帯キャリア

• T-Mobile Czech Republic: T-Mobile held 38.43 percent of active retail mobile SIM cards in mid 2025, the largest share of the Czech market, according to the telecoms regulator's annual report for 2025.
• O2 Czech Republic: O2 held 33.18 percent of active retail mobile SIM cards in mid 2025, and it won the 700 MHz block that carries a national roaming duty and service for the state's emergency and security forces.
• Vodafone Czech Republic: Vodafone held 25.15 percent of active retail mobile SIM cards in mid 2025, while virtual operators without their own radio networks shared the remaining 3.24 percent, according to the regulator.

チェコの旧世代ネットワーク

• T-Mobile switched off its Czech 3G network at the end of November 2021 and moved the 2100 MHz frequencies to LTE and 5G, saying fewer than one percent of its customers still used 3G for data.
• The regulator requires the Czech 2G networks to keep running until at least 30 June 2028, a condition attached to the 2100 MHz licences, so basic phones that only support 2G still work in Czechia for now.
• When the regulator renewed O2's 2100 MHz licence in December 2021, it obliged O2 to keep its 2G network running until at least 2028 unless the share of 2G users fell below five percent, to protect people using basic phones.

チェコの5G

• Czechia auctioned its 5G frequencies in the 700 MHz and 3400 to 3600 MHz bands in November 2020, raising 5.596 billion koruna, with blocks going to O2, T-Mobile, Vodafone, CentroNet and Nordic Telecom 5G.
• In the 2020 auction, O2 and CentroNet won 20 MHz blocks at 3400 to 3600 MHz that carry a duty to lease frequencies to industry, while PODA and Sev.en Innovations took part but won nothing.
• Vodafone runs its Czech 5G on the 700, 1800, 2100 and 3500 MHz bands, so a phone needs support for those frequencies to use Vodafone's 5G network in Czechia.

チェコのネットワークについて

• The regulator measured every Czech motorway again in 2026, in both directions and including tunnels, sampling signal roughly every 25 metres, and found 2G and 4G coverage at 100 percent on the motorways listed, with 5G slightly lower on some.
• A 2025 measurement of the transit rail corridors, including tunnels, found stretches with uncovered points, and the regulator warns that several gaps in a row can leave a phone without enough time to reconnect, so a train journey can feel less covered than the figures suggest.
• Holders of the Czech 800 MHz licences were required in 2014 to cover, within seven years, 95 percent of the population of every district with indoor signal, plus all motorways and all transit rail corridors.