出国旅行省流量的 12 个方法

Only partly. Some apps keep refreshing in the background even after being swiped away. Switching off background refresh for that app directly in settings gives a more reliable result.

The phone's counter is the operating system's own estimate, not a figure measured directly by the operator. The two can always differ by some margin. For a reliable figure, checking the operator's own channel is the better reference.

The main side effect is that some notifications may arrive a little later, since apps not currently on screen have their background connections limited. It is usually a fair trade when the goal is maximum data saving.

Download them in advance while Wi-Fi or a good signal is still available, such as at home or the accommodation, not at the moment they are actually needed, since there may not be enough signal by then.

Try the data calculator tool to estimate a more suitable allowance for the next trip, and if still unsure, ask the team via LINE at https://lin.ee/skDPoNx or email at esimonline.asia@gmail.com for further advice.

Usually yes, because desktop operating systems commonly leave automatic updates and cloud file syncing on by default. Disable both on the laptop before sharing a hotspot with it, not only the settings on the phone.

It genuinely helps, but it is not the whole answer. The mode works mainly by restricting what apps do when they are not on screen, so it cuts background use well. It does not reduce what the app in front of you is doing: play a high-resolution video and data saver will not rescue you. Lowering video quality and downloading in advance still matter. Exactly what the mode restricts differs by manufacturer and by OS version.

They are counting different things. The phone's counter usually runs from whenever you last reset it and includes every line the device has used. The supplier counts only traffic that went through the network attached to that plan, and may refresh the figure periodically rather than instantly. A small gap is normal. For planning, treat the supplier's figure as the one that matters and use the phone's counter to watch the daily trend.

You can, but doing it wholesale is a poor idea. Apps that need to notify you promptly — the family chat, the airline, a bank sending verification codes — will misbehave or alert you late, which is a worse problem than the data it saves. Better to switch it off for the heavy apps that do not need to be current, such as social and news, and leave the messaging and travel apps alone.

Look at the size of the plan rather than tightening further. Cutting until the phone is inconvenient makes the trip worse in exchange for a fairly small saving. Take the actual average from your first three days, multiply by the days remaining, and if the result exceeds what you hold, adding to the plan now is a calmer decision than sorting it out when the allowance runs dry somewhere inconvenient.

The sharing itself adds nothing. What the connecting device does is the issue: laptops and tablets treat Wi-Fi as unmetered and begin system updates and file syncing the moment they connect, which uses many times more than browsing on the phone would. Before sharing, mark the connection as metered on the joining device and pause cloud sync.

For your home SIM, yes — keep data roaming off so it cannot connect and bill you under your home operator's terms. For the travel profile you are actually using, that line usually needs data roaming enabled, because the profile works through partner networks in the country you are in. The settings are per line, so check both are set correctly rather than flipping one switch for the whole device.