スロバキアにおけるO2 Slovakiaと旅行用eSIM

O2 Slovakiaの概要

O2 Slovakia is the former Telefónica O2 Slovakia, and its UMTS (3G) network was shut down in December 2025.

O2's bands and technology

An eSIM can only use O2 if your phone supports at least one band in this table. Before you fly, open your model's spec page on the maker's site and compare its LTE and 5G band lists.

Who licenses O2

Mobile networks in Slovakia are licensed, and their spectrum assigned, by the Regulatory Authority for Electronic Communications and Postal Services (RÚ). The bands above are the ones it allocates. A problem with the local network's own service goes to the operator first; a problem with your eSIM plan comes to us.

当店で取り扱うプランのうちO2 Slovakiaを記載しているもの

From the supplier record behind each package, 88 of the 88 plans we currently sell for Slovakia declare O2 Slovakia as a network the profile can reach, at 4G and 5G. The figure comes from the same catalogue that prices the plan pages, and it moves when the supplier revises the record.

O2 beside the other networks in Slovakia

プランが特定のネットワークを名指ししない理由

Nearly every travel eSIM is a roaming product: the profile picks a network by an order the supplier sets, not by the buyer. If O2 Slovakia is weak where you are, try selecting 4ka or Orange Slovensko or Telekom manually in the network settings, and keep data roaming on for the eSIM profile.