The three ways travelers stay connected in China

Mainland Chinese networks block many of the apps a visitor leans on every day: Google services including Maps and Gmail, WhatsApp, Instagram and most Western social apps. Whether you can reach them is decided per connection, not per phone. The same phone can reach an app on one line and not on the other, in the same minute, at the same table.

A travel eSIM for China works by roaming: its data is carried back out to the network the plan is built on before it reaches the wider internet. Every China plan we sell routes that traffic out through Hong Kong or Singapore, so on the eSIM’s data those apps normally work with nothing extra installed. Hotel and cafe Wi-Fi is the trap: it is a local connection, the local rules apply to it, and no eSIM changes what somebody else’s Wi-Fi can reach. The moment your phone hops onto Wi-Fi, you are back on a local network.

This setup keeps the travel eSIM on data while your own SIM stays in the phone for calls and codes. You install the eSIM at home, you land, and your usual apps normally keep working on its data, because the traffic exits outside the mainland. There is no counter or paperwork at the destination.

It does not give you a Chinese phone number. Check the specific apps, bookings and services you plan to use to see whether they require one. Keep the things you care about on the eSIM’s data rather than on Wi-Fi, and the setup remains one install.

A local SIM can provide local data and a Chinese phone number. Whether that number is useful depends on the specific apps and services you plan to use. Buying one takes real-name registration with your passport at a counter, plans and top-ups are explained mostly in Chinese, and app stores tie some downloads to the region your account lives in.

On a local SIM the connection is local, so the apps blocked on local networks stay blocked on it. People who live there work around that on their own connections in their own ways; it is not something a data plan fixes, ours included. Compare that tradeoff with a travel eSIM for the length and needs of your own stay.

On a dual-SIM phone, your home SIM can stay active for calls, texts and the codes your bank sends while the travel eSIM carries the data. Nothing needs to be swapped out, removed or forwarded.

On an iPhone the whole arrangement takes a few minutes:

1. Buy the plan and open the QR code we email you, then add it under Settings, Cellular, Add eSIM. Do this at home on Wi-Fi, before you fly.
2. Under Cellular, set Cellular Data to the new eSIM line, and leave Default Voice Line on your own number.
3. Switch Data Roaming on for the eSIM line. A travel eSIM reaches the network by roaming, so that toggle is how the plan works rather than an extra charge.
4. Leave iMessage and FaceTime alone. They stay registered to your own number and simply travel over the eSIM’s data.
5. Turning Data Roaming off for your home line helps prevent that line from using roaming mobile data. Keeping the line active can still create call, SMS or other carrier charges under your home carrier’s terms, so check those terms and your phone’s call and message settings.

Android phones keep the same controls under Network and Internet, worded a little differently by each maker. The order is the same: install at home, hand the data to the eSIM, leave the calls on your own number.

Start with an estimate you choose rather than a claimed typical amount: estimated GB per day × trip days = the fixed-data total to compare with the plans currently listed. For example, a hypothetical 0.5 GB per day needs 3.5 GB over 7 days or 7 GB over 14 days. Add headroom for the activities you expect instead of treating this example as a recommendation.

• Fixed total: a 5 GB plan gives you one 5 GB pool across its full validity period. A heavy day can use more of that shared total and leave less for later days.
• Daily allowance: a 500 MB/day label allocates 500 MB to each service day rather than one pool shared across the trip. What happens after that daily allowance depends on what the selected plan expressly states. Compare the daily amount with your own estimate for a heavy day.
• Use the current China plan list to compare your calculated total or chosen daily allowance with each plan’s stated validity. The trip length and allowance must both fit your estimate.

Only treat throttling as part of a plan when the selected plan expressly states a fair-use policy, or FUP. Read its stated full-speed allowance and reduced-speed policy before buying. Reduced speed and local coverage vary, so do not assume a particular app or map will remain usable after throttling. Estimate video calls, uploads and other data-heavy work separately rather than applying a fixed multiplier.

You pay the plan’s displayed purchase price when you buy it. Activation and validity are separate: before buying or installing at home, check the selected plan’s conditions to see what starts validity and whether early installation is suitable.

Read down our China list and you will meet some plans twice, the second time with nonhkip in the name at a slightly higher price. The difference is where the data leaves for the wider internet: the standard plans route out through Hong Kong, and the nonhkip versions route out through Singapore instead.

Choose between the two based on whether you prefer the data to exit through Hong Kong or Singapore. Some services infer location from the exit point, and latency can differ because the data takes a different route. The suffix describes that routing difference.

1. Install the eSIM at home, on Wi-Fi, in the week before the flight. The QR code arrives by email after checkout.
2. Check that Data Roaming is on for the eSIM line. It is the most common reason a new eSIM looks dead on arrival.
3. Download offline maps and anything else heavy while you are still on your home Wi-Fi.
4. When you land, give the line a minute to find a network, then try the apps you care about on cellular data before you touch the airport Wi-Fi.
5. Keep the split in mind for the whole trip: on the eSIM’s data your apps normally work, and on any local Wi-Fi they follow the local rules.