只靠免费 Wi-Fi 够用吗？

Yes, for the time spent outside accommodation — walking around, navigating, hailing rides — since the accommodation's WiFi does not follow you outdoors.

Public networks are open to others in the same location, so more caution is warranted. It is better to do important transactions over the eSIM connection instead, where possible.

Switch to the eSIM connected directly to the mobile network instead — this is usually quicker than trying to work around that verification page.

Estimating based on the trip's actual pattern is better. If free WiFi is available often, the data actually needed is usually lower than expected — a data estimation tool gives a closer figure than guessing.

Data-heavy tasks that are not urgent — cloud photo backups, downloading offline content, app updates — are best done whenever free WiFi is available.

Yes, if you prepare seriously: download offline maps of each day's area every morning, write destination addresses in the local language, and plan public transport routes before leaving the room. What you will not have is live information — delays, closures, a restaurant shutting unexpectedly — and you will not be able to hail an app-based ride while out. If you can accept those two limits, it works.

Connections to modern sites and apps are already encrypted, so it is not the case that anyone nearby can simply read them. The remaining risk comes from the user's side: joining a network with an imitation name, or tapping past a security warning. Many people therefore keep unusually sensitive tasks on their own mobile data, which is a direct network connection — not because WiFi is unusable, but because it removes one variable.

For many people, yes — particularly if all the heavy work (photo backup, app updates, streaming) moves to your accommodation and the plan data covers maps, chat and rides. But the right amount depends heavily on personal habits: frequent video calls or leaving navigation running all day pushes the figure higher than people expect. Run your own numbers through our data calculator first.

The reliable fix is having data before you leave the terminal, which means installing and preparing a plan before you fly. Without that, the remaining options are asking at an information desk for a code, using a terminal shop's WiFi where the password may be printed on a receipt, or waiting until the hotel. These work at some airports and not others, so none of them should be your primary plan.

Tell reception first — some properties run separate networks per floor or lend out a signal repeater. If it cannot be fixed, work in the lobby, which usually has the strongest signal, and move your evening routine there. If you already carry a data plan, this becomes an inconvenience rather than a problem.

They do different jobs. WiFi suits large-file work while you are stationary; plan data suits movement and decisions that cannot wait. Most people on a city trip use both and buy a smaller plan because WiFi covers the heavy part. People who stay put for most of the trip can genuinely manage on WiFi alone. It comes down to the shape of your trip.